All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.
Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.
elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent
| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Custom scroll bar with 'margin'</title> | |
| </head> | |
| <body> | |
| <div id="content"></div> | |
| </body> | |
| </html> |
| var autoElm = document.getElementById('elm-name'); | |
| autocomplete = new google.maps.places.Autocomplete(autoElm); | |
| google.maps.event.addListener(autocomplete, 'place_changed', function () { | |
| var place = autocomplete.getPlace(); | |
| if (!place.geometry) { | |
| return; | |
| } | |
| instance.setCenter(place.geometry.location); | |
| instance.setZoom(19); |
| 'use strict'; | |
| // simple express server | |
| var express = require('express'); | |
| var app = express(); | |
| var router = express.Router(); | |
| app.use(express.static('public')); | |
| app.get('/', function(req, res) { | |
| res.sendfile('./public/index.html'); |
| <?xml version="1.0" encoding="UTF-8" ?> | |
| <opml version="1.0"> | |
| <head> | |
| <title>寸志 subscriptions in Digg Reader</title> | |
| </head> | |
| <body> | |
| <outline text="Framer Blog" title="Framer Blog" type="rss" xmlUrl="http://framerjs.tumblr.com/rss" htmlUrl="http://framerjs.tumblr.com/" /> | |
| <outline text="粉丝日志" title="粉丝日志" type="rss" xmlUrl="http://blog.fens.me/feed/" htmlUrl="http://blog.fens.me" /> | |
| <outline text="AngularJS" title="AngularJS" type="rss" xmlUrl="http://blog.angularjs.org/feeds/posts/default" htmlUrl="http://blog.angularjs.org/" /> | |
| <outline text="blog.izs.me" title="blog.izs.me" type="rss" xmlUrl="http://blog.izs.me/rss" htmlUrl="http://blog.izs.me/" /> |
| // Simulate a call to Dropbox or other service that can | |
| // return an image as an ArrayBuffer. | |
| var xhr = new XMLHttpRequest(); | |
| // Use JSFiddle logo as a sample image to avoid complicating | |
| // this example with cross-domain issues. | |
| xhr.open( "GET", "http://fiddle.jshell.net/img/logo.png", true ); | |
| // Ask for the result as an ArrayBuffer. | |
| xhr.responseType = "arraybuffer"; |
| var searchBox = new google.maps.places.SearchBox(document.getElementById('searchinput')); | |
| google.maps.event.addListener(searchBox, 'places_changed', function() { | |
| var place = searchBox.getPlaces()[0]; | |
| if (!place.geometry) return; | |
| if (place.geometry.viewport) { | |
| map.fitBounds(place.geometry.viewport); | |
| } else { |
| # Thanks to this post: | |
| # http://blog.ikato.com/post/15675823000/how-to-install-consolas-font-on-mac-os-x | |
| $ brew install cabextract | |
| $ cd ~/Downloads | |
| $ mkdir consolas | |
| $ cd consolas | |
| $ curl -O http://download.microsoft.com/download/f/5/a/f5a3df76-d856-4a61-a6bd-722f52a5be26/PowerPointViewer.exe | |
| $ cabextract PowerPointViewer.exe | |
| $ cabextract ppviewer.cab |
People
 :bowtie: |
😄 :smile: |
😆 :laughing: |
|---|---|---|
😊 :blush: |
😃 :smiley: |
:relaxed: |
😏 :smirk: |
😍 :heart_eyes: |
😘 :kissing_heart: |
😚 :kissing_closed_eyes: |
😳 :flushed: |
😌 :relieved: |
😆 :satisfied: |
😁 :grin: |
😉 :wink: |
😜 :stuck_out_tongue_winking_eye: |
😝 :stuck_out_tongue_closed_eyes: |
😀 :grinning: |
😗 :kissing: |
😙 :kissing_smiling_eyes: |
😛 :stuck_out_tongue: |
I've been coding javascript for some time now, including interacting with several javascript VMs.
Having said that, this is just a rant about what I think could be a good approach on how to actually do things in javascript. This after looking at how other projects are dealing with it, my personal experience and finally "getting" the way javascript was meant to be used (if there's such a thing). I do not consider myself an expert in javascript, so take whatever you read here with a grain of salt and think of it as just my personal experience and of course, I'll be happy to hear what you know or your best practices around it.
The real purpose for this post is to initiate a discussion about the subject of not really using OOP when dealing with javascript, and the good way to design and think about
