Pure javascript utilities

Pure javascript utilities

Pure javascript utilities

getDocHeight.js

function getDocHeight(){
  var D = document;
  return Math.max(
    document.body.scrollHeight, document.documentElement.scrollHeight,
    document.body.offsetHeight, document.documentElement.offsetHeight,
    document.body.clientHeight, document.documentElement.clientHeight
  );
}

getStaticStyle.js

function get_static_style(styles) {
    var result = [];
    styles.forEach(function(v, i, a){

        var style='';
        if( v.stylers ) { // only if there is a styler object
            if (v.stylers.length > 0) { // Needs to have a style rule to be valid.
                style += (v.hasOwnProperty('featureType') ? 'feature:' + v.featureType : 'feature:all') + '|';
                style += (v.hasOwnProperty('elementType') ? 'element:' + v.elementType : 'element:all') + '|';
                v.stylers.forEach(function(val, i, a){
                    var propertyname = Object.keys(val)[0];
                    var propertyval = val[propertyname].toString().replace('#', '0x');
                    // changed "new String()" based on: http://stackoverflow.com/a/5821991/1121532

                    style += propertyname + ':' + propertyval + '|';
                });
            }
        }
        result.push('style='+encodeURIComponent(style));
    });

    return result.join('&');
}

iframeCheck.js

 function inIframe() {
  try {
      return window.self !== window.top;
  } catch (e) {
      return true;
  }
}

scrollTo.js

function easeInOut(currentTime, start, change, duration) {
    currentTime /= duration / 2;
    if (currentTime < 1) {
        return change / 2 * currentTime * currentTime + start;
    }
    currentTime -= 1;
    return -change / 2 * (currentTime * (currentTime - 2) - 1) + start;
}

function scrollTo(element, to, duration) {
    var start = element.scrollTop,
        change = to - start,
        increment = 20;

    var animateScroll = function(elapsedTime) {        
        elapsedTime += increment;
        var position = easeInOut(elapsedTime, start, change, duration);                        
        element.scrollTop = position; 
        if (elapsedTime < duration) {
            setTimeout(function() {
                animateScroll(elapsedTime);
            }, increment);
        }
    };

    animateScroll(0);
}

//USAGE
scrollTo(document.body, 0, 300 );
scrollTo(document.documentElement, 0, 300 );