requirebin sketch

index.js

// Welcome! require() some modules from npm (like you were using browserify)
// and then hit Run Code to run your code on the right side.
// Modules get downloaded from browserify-cdn and bundled in your browser.
const HyperList = require('hyperlist')
const root = document.createElement('div')

const data = ['a', 'b', 'c', 'd']

const conf = {
  height: 160,
  itemHeight: 10,
  total: 80,
  generate: function (idx) {
    const el = document.createElement('span')
    el.innerHTML = `${data[idx] ? data[idx] : 'placeholder'}`
    if (data[idx] && idx > 3) {
      el.style.color = 'red'
    }
    return el
  }
};

const list = new HyperList(root, conf);

document.body.appendChild(root)

setTimeout(function () {
  data.push(...['e', 'f', 'g', 'h'])
  list.refresh(root, conf)
  const notice = document.createElement('span')
  notice.innerHTML = 'Scroll down & then up please'
  document.body.appendChild(notice)
}, 2500)

// scroll manually -> see the list 

minified.js

setTimeout(function(){
;require=(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({"hyperlist":[function(require,module,exports){
(function (global){
(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.HyperList = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(_dereq_,module,exports){
'use strict';

// Default configuration.

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

var defaultConfig = {
  width: '100%',
  height: '100%'
};

// Check for valid number.
var isNumber = function isNumber(input) {
  return Number(input) === Number(input);
};

/**
 * Creates a HyperList instance that virtually scrolls very large amounts of
 * data effortlessly.
 */

var HyperList = function () {
  _createClass(HyperList, null, [{
    key: 'create',
    value: function create(element, userProvidedConfig) {
      return new HyperList(element, userProvidedConfig);
    }

    /**
     * Merge given css style on an element
     * @param {DOMElement} element
     * @param {Object} style
     */

  }, {
    key: 'mergeStyle',
    value: function mergeStyle(element, style) {
      for (var i in style) {
        if (element.style[i] !== style[i]) {
          element.style[i] = style[i];
        }
      }
    }
  }, {
    key: 'getMaxBrowserHeight',
    value: function getMaxBrowserHeight() {
      // Create two elements, the wrapper is `1px` tall and is transparent and
      // positioned at the top of the page. Inside that is an element that gets
      // set to 1 billion pixels. Then reads the max height the browser can
      // calculate.
      var wrapper = document.createElement('div');
      var fixture = document.createElement('div');

      // As said above, these values get set to put the fixture elements into the
      // right visual state.
      HyperList.mergeStyle(wrapper, { position: 'absolute', height: '1px', opacity: 0 });
      HyperList.mergeStyle(fixture, { height: '1e7px' });

      // Add the fixture into the wrapper element.
      wrapper.appendChild(fixture);

      // Apply to the page, the values won't kick in unless this is attached.
      document.body.appendChild(wrapper);

      // Get the maximum element height in pixels.
      var maxElementHeight = fixture.offsetHeight;

      // Remove the element immediately after reading the value.
      document.body.removeChild(wrapper);

      return maxElementHeight;
    }
  }]);

  function HyperList(element, userProvidedConfig) {
    var _this = this;

    _classCallCheck(this, HyperList);

    this._config = {};
    this._lastRepaint = null;
    this._maxElementHeight = HyperList.getMaxBrowserHeight();

    this.refresh(element, userProvidedConfig);

    var config = this._config;

    // Create internal render loop.
    var render = function render() {
      var scrollTop = _this._getScrollPosition();
      var lastRepaint = _this._lastRepaint;

      _this._renderAnimationFrame = window.requestAnimationFrame(render);

      if (scrollTop === lastRepaint) {
        return;
      }

      if (!lastRepaint || Math.abs(scrollTop - lastRepaint) > _this._averageHeight) {
        var rendered = _this._renderChunk();

        _this._lastRepaint = scrollTop;

        if (rendered !== false && typeof config.afterRender === 'function') {
          config.afterRender();
        }
      }
    };

    render();
  }

  _createClass(HyperList, [{
    key: 'destroy',
    value: function destroy() {
      window.cancelAnimationFrame(this._renderAnimationFrame);
    }
  }, {
    key: 'refresh',
    value: function refresh(element, userProvidedConfig) {
      var _this2 = this;

      Object.assign(this._config, defaultConfig, userProvidedConfig);

      if (!element || element.nodeType !== 1) {
        throw new Error('HyperList requires a valid DOM Node container');
      }

      this._element = element;

      var config = this._config;

      var scroller = this._scroller || config.scroller || document.createElement(config.scrollerTagName || 'tr');

      // Default configuration option `useFragment` to `true`.
      if (typeof config.useFragment !== 'boolean') {
        this._config.useFragment = true;
      }

      if (!config.generate) {
        throw new Error('Missing required `generate` function');
      }

      if (!isNumber(config.total)) {
        throw new Error('Invalid required `total` value, expected number');
      }

      if (!Array.isArray(config.itemHeight) && !isNumber(config.itemHeight)) {
        throw new Error('\n        Invalid required `itemHeight` value, expected number or array\n      '.trim());
      } else if (isNumber(config.itemHeight)) {
        this._itemHeights = Array(config.total).fill(config.itemHeight);
      } else {
        this._itemHeights = config.itemHeight;
      }

      // Width and height should be coerced to string representations. Either in
      // `%` or `px`.
      Object.keys(defaultConfig).filter(function (prop) {
        return prop in config;
      }).forEach(function (prop) {
        var value = config[prop];
        var isValueNumber = isNumber(value);
        var isValuePercent = isValueNumber ? false : value.slice(-1) === '%';

        if (value && typeof value !== 'string' && typeof value !== 'number') {
          var msg = 'Invalid optional `' + prop + '`, expected string or number';
          throw new Error(msg);
        } else if (isValueNumber) {
          config[prop] = value + 'px';
        }

        if (prop !== 'height') {
          return;
        }

        // Compute the containerHeight as number
        var numberValue = isValueNumber ? value : parseInt(value.replace(/px|%/, ''), 10);

        if (isValuePercent) {
          _this2._containerHeight = window.innerHeight * numberValue / 100;
        } else {
          _this2._containerHeight = isNumber(value) ? value : numberValue;
        }
      });

      // Decorate the container element with styles that will match
      // the user supplied configuration.
      var elementStyle = {
        width: '' + config.width,
        height: '' + config.height,
        overflow: 'auto',
        position: 'relative'
      };

      HyperList.mergeStyle(element, elementStyle);

      var scrollerHeight = config.itemHeight * config.total;
      var maxElementHeight = this._maxElementHeight;

      if (scrollerHeight > maxElementHeight) {
        console.warn(['HyperList: The maximum element height', maxElementHeight + 'px has', 'been exceeded; please reduce your item height.'].join(' '));
      }

      var scrollerStyle = {
        opacity: '0',
        position: 'absolute',
        width: '1px',
        height: scrollerHeight + 'px'
      };

      HyperList.mergeStyle(scroller, scrollerStyle);

      // Only append the scroller element once.
      if (!this._scroller) {
        element.appendChild(scroller);
      }

      // Set the scroller instance.
      this._scroller = scroller;
      this._scrollHeight = this._computeScrollHeight();

      // Reuse the item positions if refreshed, otherwise set to empty array.
      this._itemPositions = this._itemPositions || Array(config.total).fill(0);

      // Each index in the array should represent the position in the DOM.
      this._computePositions(0);

      // Render after refreshing.
      this._renderChunk();

      if (typeof config.afterRender === 'function') {
        config.afterRender();
      }
    }
  }, {
    key: '_getRow',
    value: function _getRow(i) {
      var config = this._config;
      var item = config.generate(i);
      var height = item.height;

      if (height !== undefined && isNumber(height)) {
        item = item.element;

        // The height isn't the same as predicted, compute positions again
        if (height !== this._itemHeights) {
          this._itemHeights[i] = height;
          this._computePositions(i);
          this._scrollHeight = this._computeScrollHeight(i);
        }
      } else {
        height = this._itemHeights[i];
      }

      if (!item || item.nodeType !== 1) {
        throw new Error('Generator did not return a DOM Node for index: ' + i);
      }

      var oldClass = item.getAttribute('class') || '';
      item.setAttribute('class', oldClass + ' ' + (config.rowClassName || 'vrow'));

      var top = this._itemPositions[i];

      HyperList.mergeStyle(item, {
        position: 'absolute',
        top: top + 'px'
      });

      return item;
    }
  }, {
    key: '_getScrollPosition',
    value: function _getScrollPosition() {
      var config = this._config;

      if (typeof config.overrideScrollPosition === 'function') {
        return config.overrideScrollPosition();
      }

      return this._element.scrollTop;
    }
  }, {
    key: '_renderChunk',
    value: function _renderChunk() {
      var config = this._config;
      var element = this._element;
      var scrollTop = this._getScrollPosition();
      var total = config.total;

      var from = config.reverse ? this._getReverseFrom(scrollTop) : this._getFrom(scrollTop) - 1;
      from = from < 0 ? 0 : from;

      if (this._lastFrom === from) {
        return false;
      }

      this._lastFrom = from;

      var to = from + this._cachedItemsLen;
      to = to > total ? total : to;

      // Append all the new rows in a document fragment that we will later append
      // to the parent node
      var fragment = config.useFragment ? document.createDocumentFragment() : []
      // Sometimes you'll pass fake elements to this tool and Fragments require
      // real elements.


      // The element that forces the container to scroll.
      ;var scroller = this._scroller;

      // Keep the scroller in the list of children.
      fragment[config.useFragment ? 'appendChild' : 'push'](scroller);

      for (var i = from; i < to; i++) {
        var row = this._getRow(i);

        fragment[config.useFragment ? 'appendChild' : 'push'](row);
      }

      if (config.applyPatch) {
        return config.applyPatch(element, fragment);
      }

      element.innerHTML = '';
      element.appendChild(fragment);
    }
  }, {
    key: '_computePositions',
    value: function _computePositions() {
      var from = arguments.length <= 0 || arguments[0] === undefined ? 1 : arguments[0];

      var config = this._config;
      var total = config.total;
      var reverse = config.reverse;

      if (from < 1 && !reverse) {
        from = 1;
      }

      for (var i = from; i < total; i++) {
        if (reverse) {
          if (i === 0) {
            this._itemPositions[0] = this._scrollHeight - this._itemHeights[0];
          } else {
            this._itemPositions[i] = this._itemPositions[i - 1] - this._itemHeights[i];
          }
        } else {
          this._itemPositions[i] = this._itemHeights[i - 1] + this._itemPositions[i - 1];
        }
      }
    }
  }, {
    key: '_computeScrollHeight',
    value: function _computeScrollHeight() {
      var _this3 = this;

      var config = this._config;
      var total = config.total;
      var scrollHeight = this._itemHeights.reduce(function (a, b) {
        return a + b;
      }, 0);

      HyperList.mergeStyle(this._scroller, {
        opacity: 0,
        position: 'absolute',
        width: '1px',
        height: scrollHeight + 'px'
      });

      var averageHeight = scrollHeight / total;
      var containerHeight = this._element.innerHeight ? this._element.innerHeight : this._containerHeight;
      this._screenItemsLen = Math.ceil(containerHeight / averageHeight);
      this._containerHeight = containerHeight;

      // Cache 3 times the number of items that fit in the container viewport.
      this._cachedItemsLen = this._screenItemsLen * 3;
      this._averageHeight = averageHeight;

      if (config.reverse) {
        window.requestAnimationFrame(function () {
          _this3._element.scrollTop = scrollHeight;
        });
      }

      return scrollHeight;
    }
  }, {
    key: '_getFrom',
    value: function _getFrom(scrollTop) {
      var i = 0;

      while (this._itemPositions[i] < scrollTop) {
        i++;
      }

      return i;
    }
  }, {
    key: '_getReverseFrom',
    value: function _getReverseFrom(scrollTop) {
      var i = this._config.total - 1;

      while (i > 0 && this._itemPositions[i] < scrollTop + this._containerHeight) {
        i--;
      }

      return i;
    }
  }]);

  return HyperList;
}();

exports.default = HyperList;
module.exports = exports['default'];

},{}]},{},[1])(1)
});
}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})

},{}]},{},[])
//# sourceMappingURL=data:application/json;charset=utf-8;base64,{"version":3,"sources":["../../../../home/admin/browserify-cdn/node_modules/browserify/node_modules/browser-pack/_prelude.js","dist/hyperlist.js"],"names":[],"mappings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file":"generated.js","sourceRoot":"","sourcesContent":["(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require==\"function\"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error(\"Cannot find module '\"+o+\"'\");throw f.code=\"MODULE_NOT_FOUND\",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require==\"function\"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})","(function(f){if(typeof exports===\"object\"&&typeof module!==\"undefined\"){module.exports=f()}else if(typeof define===\"function\"&&define.amd){define([],f)}else{var g;if(typeof window!==\"undefined\"){g=window}else if(typeof global!==\"undefined\"){g=global}else if(typeof self!==\"undefined\"){g=self}else{g=this}g.HyperList = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require==\"function\"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error(\"Cannot find module '\"+o+\"'\");throw f.code=\"MODULE_NOT_FOUND\",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require==\"function\"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(_dereq_,module,exports){\n'use strict';\n\n// Default configuration.\n\nObject.defineProperty(exports, \"__esModule\", {\n  value: true\n});\n\nvar _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();\n\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\nvar defaultConfig = {\n  width: '100%',\n  height: '100%'\n};\n\n// Check for valid number.\nvar isNumber = function isNumber(input) {\n  return Number(input) === Number(input);\n};\n\n/**\n * Creates a HyperList instance that virtually scrolls very large amounts of\n * data effortlessly.\n */\n\nvar HyperList = function () {\n  _createClass(HyperList, null, [{\n    key: 'create',\n    value: function create(element, userProvidedConfig) {\n      return new HyperList(element, userProvidedConfig);\n    }\n\n    /**\n     * Merge given css style on an element\n     * @param {DOMElement} element\n     * @param {Object} style\n     */\n\n  }, {\n    key: 'mergeStyle',\n    value: function mergeStyle(element, style) {\n      for (var i in style) {\n        if (element.style[i] !== style[i]) {\n          element.style[i] = style[i];\n        }\n      }\n    }\n  }, {\n    key: 'getMaxBrowserHeight',\n    value: function getMaxBrowserHeight() {\n      // Create two elements, the wrapper is `1px` tall and is transparent and\n      // positioned at the top of the page. Inside that is an element that gets\n      // set to 1 billion pixels. Then reads the max height the browser can\n      // calculate.\n      var wrapper = document.createElement('div');\n      var fixture = document.createElement('div');\n\n      // As said above, these values get set to put the fixture elements into the\n      // right visual state.\n      HyperList.mergeStyle(wrapper, { position: 'absolute', height: '1px', opacity: 0 });\n      HyperList.mergeStyle(fixture, { height: '1e7px' });\n\n      // Add the fixture into the wrapper element.\n      wrapper.appendChild(fixture);\n\n      // Apply to the page, the values won't kick in unless this is attached.\n      document.body.appendChild(wrapper);\n\n      // Get the maximum element height in pixels.\n      var maxElementHeight = fixture.offsetHeight;\n\n      // Remove the element immediately after reading the value.\n      document.body.removeChild(wrapper);\n\n      return maxElementHeight;\n    }\n  }]);\n\n  function HyperList(element, userProvidedConfig) {\n    var _this = this;\n\n    _classCallCheck(this, HyperList);\n\n    this._config = {};\n    this._lastRepaint = null;\n    this._maxElementHeight = HyperList.getMaxBrowserHeight();\n\n    this.refresh(element, userProvidedConfig);\n\n    var config = this._config;\n\n    // Create internal render loop.\n    var render = function render() {\n      var scrollTop = _this._getScrollPosition();\n      var lastRepaint = _this._lastRepaint;\n\n      _this._renderAnimationFrame = window.requestAnimationFrame(render);\n\n      if (scrollTop === lastRepaint) {\n        return;\n      }\n\n      if (!lastRepaint || Math.abs(scrollTop - lastRepaint) > _this._averageHeight) {\n        var rendered = _this._renderChunk();\n\n        _this._lastRepaint = scrollTop;\n\n        if (rendered !== false && typeof config.afterRender === 'function') {\n          config.afterRender();\n        }\n      }\n    };\n\n    render();\n  }\n\n  _createClass(HyperList, [{\n    key: 'destroy',\n    value: function destroy() {\n      window.cancelAnimationFrame(this._renderAnimationFrame);\n    }\n  }, {\n    key: 'refresh',\n    value: function refresh(element, userProvidedConfig) {\n      var _this2 = this;\n\n      Object.assign(this._config, defaultConfig, userProvidedConfig);\n\n      if (!element || element.nodeType !== 1) {\n        throw new Error('HyperList requires a valid DOM Node container');\n      }\n\n      this._element = element;\n\n      var config = this._config;\n\n      var scroller = this._scroller || config.scroller || document.createElement(config.scrollerTagName || 'tr');\n\n      // Default configuration option `useFragment` to `true`.\n      if (typeof config.useFragment !== 'boolean') {\n        this._config.useFragment = true;\n      }\n\n      if (!config.generate) {\n        throw new Error('Missing required `generate` function');\n      }\n\n      if (!isNumber(config.total)) {\n        throw new Error('Invalid required `total` value, expected number');\n      }\n\n      if (!Array.isArray(config.itemHeight) && !isNumber(config.itemHeight)) {\n        throw new Error('\\n        Invalid required `itemHeight` value, expected number or array\\n      '.trim());\n      } else if (isNumber(config.itemHeight)) {\n        this._itemHeights = Array(config.total).fill(config.itemHeight);\n      } else {\n        this._itemHeights = config.itemHeight;\n      }\n\n      // Width and height should be coerced to string representations. Either in\n      // `%` or `px`.\n      Object.keys(defaultConfig).filter(function (prop) {\n        return prop in config;\n      }).forEach(function (prop) {\n        var value = config[prop];\n        var isValueNumber = isNumber(value);\n        var isValuePercent = isValueNumber ? false : value.slice(-1) === '%';\n\n        if (value && typeof value !== 'string' && typeof value !== 'number') {\n          var msg = 'Invalid optional `' + prop + '`, expected string or number';\n          throw new Error(msg);\n        } else if (isValueNumber) {\n          config[prop] = value + 'px';\n        }\n\n        if (prop !== 'height') {\n          return;\n        }\n\n        // Compute the containerHeight as number\n        var numberValue = isValueNumber ? value : parseInt(value.replace(/px|%/, ''), 10);\n\n        if (isValuePercent) {\n          _this2._containerHeight = window.innerHeight * numberValue / 100;\n        } else {\n          _this2._containerHeight = isNumber(value) ? value : numberValue;\n        }\n      });\n\n      // Decorate the container element with styles that will match\n      // the user supplied configuration.\n      var elementStyle = {\n        width: '' + config.width,\n        height: '' + config.height,\n        overflow: 'auto',\n        position: 'relative'\n      };\n\n      HyperList.mergeStyle(element, elementStyle);\n\n      var scrollerHeight = config.itemHeight * config.total;\n      var maxElementHeight = this._maxElementHeight;\n\n      if (scrollerHeight > maxElementHeight) {\n        console.warn(['HyperList: The maximum element height', maxElementHeight + 'px has', 'been exceeded; please reduce your item height.'].join(' '));\n      }\n\n      var scrollerStyle = {\n        opacity: '0',\n        position: 'absolute',\n        width: '1px',\n        height: scrollerHeight + 'px'\n      };\n\n      HyperList.mergeStyle(scroller, scrollerStyle);\n\n      // Only append the scroller element once.\n      if (!this._scroller) {\n        element.appendChild(scroller);\n      }\n\n      // Set the scroller instance.\n      this._scroller = scroller;\n      this._scrollHeight = this._computeScrollHeight();\n\n      // Reuse the item positions if refreshed, otherwise set to empty array.\n      this._itemPositions = this._itemPositions || Array(config.total).fill(0);\n\n      // Each index in the array should represent the position in the DOM.\n      this._computePositions(0);\n\n      // Render after refreshing.\n      this._renderChunk();\n\n      if (typeof config.afterRender === 'function') {\n        config.afterRender();\n      }\n    }\n  }, {\n    key: '_getRow',\n    value: function _getRow(i) {\n      var config = this._config;\n      var item = config.generate(i);\n      var height = item.height;\n\n      if (height !== undefined && isNumber(height)) {\n        item = item.element;\n\n        // The height isn't the same as predicted, compute positions again\n        if (height !== this._itemHeights) {\n          this._itemHeights[i] = height;\n          this._computePositions(i);\n          this._scrollHeight = this._computeScrollHeight(i);\n        }\n      } else {\n        height = this._itemHeights[i];\n      }\n\n      if (!item || item.nodeType !== 1) {\n        throw new Error('Generator did not return a DOM Node for index: ' + i);\n      }\n\n      var oldClass = item.getAttribute('class') || '';\n      item.setAttribute('class', oldClass + ' ' + (config.rowClassName || 'vrow'));\n\n      var top = this._itemPositions[i];\n\n      HyperList.mergeStyle(item, {\n        position: 'absolute',\n        top: top + 'px'\n      });\n\n      return item;\n    }\n  }, {\n    key: '_getScrollPosition',\n    value: function _getScrollPosition() {\n      var config = this._config;\n\n      if (typeof config.overrideScrollPosition === 'function') {\n        return config.overrideScrollPosition();\n      }\n\n      return this._element.scrollTop;\n    }\n  }, {\n    key: '_renderChunk',\n    value: function _renderChunk() {\n      var config = this._config;\n      var element = this._element;\n      var scrollTop = this._getScrollPosition();\n      var total = config.total;\n\n      var from = config.reverse ? this._getReverseFrom(scrollTop) : this._getFrom(scrollTop) - 1;\n      from = from < 0 ? 0 : from;\n\n      if (this._lastFrom === from) {\n        return false;\n      }\n\n      this._lastFrom = from;\n\n      var to = from + this._cachedItemsLen;\n      to = to > total ? total : to;\n\n      // Append all the new rows in a document fragment that we will later append\n      // to the parent node\n      var fragment = config.useFragment ? document.createDocumentFragment() : []\n      // Sometimes you'll pass fake elements to this tool and Fragments require\n      // real elements.\n\n\n      // The element that forces the container to scroll.\n      ;var scroller = this._scroller;\n\n      // Keep the scroller in the list of children.\n      fragment[config.useFragment ? 'appendChild' : 'push'](scroller);\n\n      for (var i = from; i < to; i++) {\n        var row = this._getRow(i);\n\n        fragment[config.useFragment ? 'appendChild' : 'push'](row);\n      }\n\n      if (config.applyPatch) {\n        return config.applyPatch(element, fragment);\n      }\n\n      element.innerHTML = '';\n      element.appendChild(fragment);\n    }\n  }, {\n    key: '_computePositions',\n    value: function _computePositions() {\n      var from = arguments.length <= 0 || arguments[0] === undefined ? 1 : arguments[0];\n\n      var config = this._config;\n      var total = config.total;\n      var reverse = config.reverse;\n\n      if (from < 1 && !reverse) {\n        from = 1;\n      }\n\n      for (var i = from; i < total; i++) {\n        if (reverse) {\n          if (i === 0) {\n            this._itemPositions[0] = this._scrollHeight - this._itemHeights[0];\n          } else {\n            this._itemPositions[i] = this._itemPositions[i - 1] - this._itemHeights[i];\n          }\n        } else {\n          this._itemPositions[i] = this._itemHeights[i - 1] + this._itemPositions[i - 1];\n        }\n      }\n    }\n  }, {\n    key: '_computeScrollHeight',\n    value: function _computeScrollHeight() {\n      var _this3 = this;\n\n      var config = this._config;\n      var total = config.total;\n      var scrollHeight = this._itemHeights.reduce(function (a, b) {\n        return a + b;\n      }, 0);\n\n      HyperList.mergeStyle(this._scroller, {\n        opacity: 0,\n        position: 'absolute',\n        width: '1px',\n        height: scrollHeight + 'px'\n      });\n\n      var averageHeight = scrollHeight / total;\n      var containerHeight = this._element.innerHeight ? this._element.innerHeight : this._containerHeight;\n      this._screenItemsLen = Math.ceil(containerHeight / averageHeight);\n      this._containerHeight = containerHeight;\n\n      // Cache 3 times the number of items that fit in the container viewport.\n      this._cachedItemsLen = this._screenItemsLen * 3;\n      this._averageHeight = averageHeight;\n\n      if (config.reverse) {\n        window.requestAnimationFrame(function () {\n          _this3._element.scrollTop = scrollHeight;\n        });\n      }\n\n      return scrollHeight;\n    }\n  }, {\n    key: '_getFrom',\n    value: function _getFrom(scrollTop) {\n      var i = 0;\n\n      while (this._itemPositions[i] < scrollTop) {\n        i++;\n      }\n\n      return i;\n    }\n  }, {\n    key: '_getReverseFrom',\n    value: function _getReverseFrom(scrollTop) {\n      var i = this._config.total - 1;\n\n      while (i > 0 && this._itemPositions[i] < scrollTop + this._containerHeight) {\n        i--;\n      }\n\n      return i;\n    }\n  }]);\n\n  return HyperList;\n}();\n\nexports.default = HyperList;\nmodule.exports = exports['default'];\n\n},{}]},{},[1])(1)\n});"]}
// Welcome! require() some modules from npm (like you were using browserify)
// and then hit Run Code to run your code on the right side.
// Modules get downloaded from browserify-cdn and bundled in your browser.
const HyperList = require('hyperlist')
const root = document.createElement('div')

const data = ['a', 'b', 'c', 'd']

const conf = {
  height: 160,
  itemHeight: 10,
  total: 80,
  generate: function (idx) {
    const el = document.createElement('span')
    el.innerHTML = `${data[idx] ? data[idx] : 'placeholder'}`
    if (data[idx] && idx > 3) {
      el.style.color = 'red'
    }
    return el
  }
};

const list = new HyperList(root, conf);

document.body.appendChild(root)

setTimeout(function () {
  data.push(...['e', 'f', 'g', 'h'])
  list.refresh(root, conf)
  const notice = document.createElement('span')
  notice.innerHTML = 'Scroll down & then up please'
  document.body.appendChild(notice)
}, 2500)

// scroll manually -> see the list 
;}, 0)

package.json

{
  "name": "requirebin-sketch",
  "version": "1.0.0",
  "dependencies": {
    "hyperlist": "1.0.0-alpha-7"
  }
}

page-body.html

<!-- contents of this file will be placed inside the <body> -->

page-head.html

<!-- contents of this file will be placed inside the <head> -->

requirebin.md

made with requirebin