webpack in reactjs

Summary of the use of Reactjs in car H5Q: Android 4.4webview display blank?A: The initial suspicion is that the CSS property is not prefixed with the compatibility problem, but added after the discovery is not, through WebView debugging after the console output Set is undefined, after the search found react dependent collection type Map and set. So if you want to be compatible with a low-version browser you can introduce a global polyfill, such as Cor

About Reactjs, the following summary, mainly has the following points: 1, Reactjs is based on the development of components, so eventually your page should be composed of a number of small components of large components. 2, you can pass the value of the attribute to the component, the same can also through the properties of the internal results passed to the parent component (for everyone to study); To do D

"" How to convert JSX Transformer Babel official website: http://babeljs.io/Inside there is a can see conversion tester, ES6 What can also be applied:Note: JSX to use uppercase class, for, style, OnChange is not a keyword. Style use style when using color = {{color: ' Red ', fontsize:20}}"" Example two:varHello =React.createclass ({render:function () {return( This. Props.name}! ); } }); varProps = {}; Props.name="Chen"; Props.age=

=this.props.data.map (function (comment) { N Bsp Return ( the 7.this.state Property object can be changed. (e.g. user input, server request, time change, etc.)Getinitialstate defines the initial variable, which can be read by the This.state property. the This.setstate method is to modify the state value. Html:8. The Proptypes property of the component, which verifies that the passed in parameters meet the requirements. the Getdefaultprops method of the component used to set the defaul

seems like everything is fine, but the problem is that the parent and child components are used to refer to the same object, and when the user triggers the Click event, the prop of Innercomponent will change, so its function will be shouldComponentUpdate called, and if you follow our current shouldComponentUpdate than the logical words, this.props.value.foo and nextProps.value.foo are equal, because in fact, they both refer to the same object Oh ~ So, we will see that the Innercomponent UI is n

returns false.2.3 Componentwillupdate (Object Nextprops,object nextstate) was called before the update. This.setstate () cannot be called within this method.2.4 Componentdidupdate (Object Prevprops,object prevstate) is called after the update is complete.3.Unmounting: The component is removed from the DOMAt this stage, there is only one method:The 3.1 Componentwillunmount () component is called before it is removed and destroyed. should be cleanup here.4. Examplevar Hello =React.createclass ({g

1. Hello React Simple component building.var helloreact = React.createclass ({Render:function () {Return ()}});Reactdom.render (Document.queryselector (' body ');)2, React life cycle (initialization, update and destruction); Getdefaultprops//Create a build props Getinitalstate//Instantiation status Componentwillmount//before mounting Componentdidmount//Mount Componentwillreceiveprops//When the property is changed Shouldcomponentupdate//Whether with the new Compon

resources can be processed from the aspects of packaging, caching and CDN distribution.For Point B, there are two ways to solve it:1) synchronous + Asynchronous data request: When the page is refreshed, using the synchronous MVC framework, the initialization data is brought in through the background route, and the intra-page routing jumps still takes place asynchronously.2) asynchronous data request in advance: When the page is refreshed, the data request is advanced to the JS resource before l

Handleinputchange = (Event) = = {Const TARGET =Event.target; Const type=Target.type; Const value=String.prototype.trim.call (Target.value); Const name=Target.name; if(Type = = = ' checkbox ') { if( This. state.formdata[name] = = = undefined) {//Create This. SetState (() =({formData:Object.assign ( This. State.formdata, {[name]: [value],}),}); } Else{Const ValueIndex= This. State.formdata[name].indexof (value); if(ValueIndex //Find out if it has been checked

Detailed process of webpack construction and webpack Construction As a module loading and packaging artifact, you only need to configure a few files and load various loaders to enjoy painless process-based development. However, for a complicated plug-in set such as webpack, its overall process and ideas are still very transparent to us. This article aims to clari

us to get the corresponding elements: varComponent1 =React.createclass ({CLICKCB:function(e) {if(E.target = = = This. Refs.li2.getDOMNode ()) {Alert (' You ordered the second Li. ')}}, Render:function() { return( This.clickcb}> } }); vardiv = document.getElementById (' A '); React.render (As we bind a ref attribute to the second Then bind the point-click event, when clicked to determine whether the Li element is equal to This.refs.li2.getDOMNode (), if so, then pop aler

Jest--painless JavaScript UnitTestingCharacteristics Strong Adaptability use Jasmine assertion by default the modular the extensible can be configured with sandbox-style and fast virtualized JS Environment, simulation browser running worker threads in parallel The default simulation framework automatically simulates all modules by default for easy testing of current code Integrated Babel