function validateChildKeys(node, parentType) { if (typeof node !== 'object') { return; } // 检查数组中的item是否有keys if (Array.isArray(node)) { for (var i = 0; i < node.length; i++) { var child = node[i]; if (isValidElement(child)) { validateExplicitKey(child, parent...
classClickCounterextendsReact.Component{...handleClick(){this.setState((state)=>{return{count:state.count+1};});}} Every React component has an associated updater which acts as a bridge between the components and the React core.This allows setState to be implemented differently by ReactDOM,Re...
number=150,// Configuration of a dropping element. Dropping element is a "virtual" element// which appears when you drag over some element from outside.// It can be changed by passing specific parameters:// i - id of an element// w - width of an element// h - height of an ...
hostSetElementText(container, c2 as string) } }else{//匹配新老 Vnode 是数组,则全量比较;否则移除当前所有的节点if(prevShapeFlag &ShapeFlags.ARRAY_CHILDREN) {if(shapeFlag &ShapeFlags.ARRAY_CHILDREN) { patchKeyedChildren(c1, c2, container, anchor, parentComponent, parentSuspense,...) }else{ un...
Refs can be either a string or a function. Using a string will tell React to automatically store the DOM Element asthis.refs[refValue]. For example: class List extends Component { constructor(p){ super(p) } _printValue(){ console.log(this.refs.someThing.value) ...
dragHandlePropsis an object which should be spread as props on the HTML element to be used as the drag handle. The whole item will be draggable by the wrapped element. See theexampleto see how it should be used. commonPropswill be set to the same value passed as thecommonPropsprop to...
React.render(Hello{firstname}!,document.getElementById('app')); …then React escapes the content offirstname(Figure 4-8). Figure 4-8.Escaping strings Spread Attributes JSXborrows a useful feature from ECMAScript6 called thespread operatorand adopts it as a convenience when defining properties...
components/Book.js create mode 100644 src/components/BookForm.js create mode 100644 src/components/BooksList.js create mode 100644 src/components/EditBook.js create mode 100644 src/components/Header.js create mode 100644 src/context/BooksContext.js create mode 100644 src/hooks/useLocalStorage.js ...
value@^5.0.1": + version "5.0.1" + resolved "https://registry.yarnpkg.com/@svgr/babel-plugin-replace-jsx-attribute-value/-/babel-plugin-replace-jsx-attribute-value-5.0.1.tgz#0b221fc57f9fcd10e91fe219e2cd0dd03145a897" + integrity sha512-PoiE6ZD2Eiy5mK+fjHqwGOS+IXX0wq/YDtNyIgOr...
array =null,// If not provided, use data-grid props on children// Margin between items [x, y] in px.margin