typeof Output “undefined” “object” (historical quirk) Common Usage Variables, function return values, missing object properties To represent a variable that is intentionally empty Example let a; console.log(a); // undefined let b = null; console.log(b); // null undefined and null are ...
mykeyValues){//没有则跳出if(!obj["mykey"]){returnmykeyValues;}else{//有就放入mykeyValues.push(obj["mykey"]);//再次递归varkeys=Object.keys(obj);keys.forEach(function(i){getMykey(obj[i],mykeyValues
AI代码解释 classSnapshotSandBox{windowSnapshot={};modifyPropsMap={};active(){for(constpropinwindow){this.windowSnapshot[prop]=window[prop];}Object.keys(this.modifyPropsMap).forEach(prop=>{window[prop]=this.modifyPropsMap[prop];});}inactive(){for(constpropinwindow){if(window[prop]!==this...
You construct an iterable object by giving a seed iterable and options. in the example below,'abcdefgh'is the seed and4is the size of the element. letit=new$C.Combination('abcdefgh',4); if you hatenew, you can useKlass.ofwhereKlassis one of the classes this module offers. ...
element is the jqLite-wrapped element that this directive matches.是一个指令匹配到的那个jqLite包装后的元素 attrs is a hash object with key-value pairs of normalized attribute names and their corresponding attribute values. 是一个键值对对象,保存着属性的名称和值。 In our link function, we want ...
WebTorrent is also available as a standalone script (webtorrent.min.js) which exposesWebTorrenton thewindowobject, so it can be used with just a script tag: <scripttype='module'>importWebTorrentfrom'webtorrent.min.js'</script> The WebTorrent script is also hosted on fast, reliable CDN infrastr...
If you are invoking node directly, you can avoid the environment variable and pass those flags to node. node --loader ts-node/esm --inspect ./index.ts Programmatic You can require ts-node and register the loader for future requires by using require('ts-node').register({ /* options */...
nameCache (default: null)— pass an empty object {} or a previously used nameCache object if you wish to cache mangled variable and property names across multiple invocations of minify(). Note: this is a read/write property. minify() will read the name cache state of this object and upd...
isAuthenticated = !!user; // convert to boolean authState.users = user; // also store user object on authState return authState; } }; const oktaAuth = new OktaAuth(config); oktaAuth.authStateManager.subscribe(authState => { // handle latest authState }); oktaAuth.authStateManager....
TypeObjectNotAvailable 6010 此类型的类型对象不可用。 UncaughtException 5022 引发了异常,但未被捕获。 UndeclaredVariable 1135 未声明变量。 UndefinedIdentifier 5009 未定义标识符。 UnexpectedSemicolon 1196 意外的“;”。 UnreachableCatch 1133 永远不会到达 Catch 子句。 UnterminatedString 1015 字符串常量未终止...