JavaScript是一种解释执行的脚本语言,是一种动态类型、弱类型、基于原型的语言,内置支持类型,它遵循ECMAScript标准。它的解释器被称为JavaScript引擎,为浏览器的一部分,广泛用于客户端的脚本语言,主要用来给HTML增加动态功能。 几乎所有主流的语言都可以编译为JavaScript,进而能够在所有平台上的浏览器中执行,这也体现了Java...
obj.firstKey ="Hello World";// 获取属性 let key = obj.firstKey;//2. “方括号”法// 设置属性 obj["firstKey"] ="Hello World";// 获取属性 let key = newObject["firstKey"];// 方法1和2的区别在于用方括号的方式内可以写表达式//3. Object.defineProperty方式// 设置属性 Object.definePropert...
classPerson { #firstName ='Joseph'; #lastName ='Stevens';getname() {return`${this.#firstName}${this.#lastName}`; }}constperson =newPerson();console.log(person.name);// SyntaxError: Private field '#firstName' must be// declared i...
// 读取数据库数据axios.get("test.db", {responseType:'arraybuffer'}) .then(function(response) {letdb =newwindow.SQL.Database(newUint8Array(response.data));// 执行查询lets =newDate().getTime();letr = db.exec("SELECT * FROM sys_user WHERE status = 1;");lete =newDate().getTime()...
firstElementChild,指向第一个 Element 类型的子元素(Element版firstChild); lastElementChild,指向最后一个 Element 类型的子元素(Element版lastChild); previousElementSibling , 指向前一个Element类型的同胞元素(Element版previousSibling); nextElementSibling,指向后一个 Element 类型的同胞元素(Element版nextSibling)。
// first item in this bucket is stored. // [3 + NumberOfBuckets()..length]: "data table", an array of length // Capacity() * kEntrySize, where the first entrysize // items are handled by the derived class and the // item at kChainOffset is another entry into the ...
A live pastebin for HTML, CSS & JavaScript and a range of processors, including SCSS, CoffeeScript, Jade and more...
For data attributes, append the option name to data-, as in data-interval="". Nametypedefaultdescription interval number 5000 The amount of time to delay between automatically cycling an item. If false, carousel will not automatically cycle. pause string | null "hover" If set to "hover", ...
newItem:要插入的节点 exsitingItem:参考节点 需要参考父节点 例1:添加段落 ===添加段落-方法一=== 添加段落 function addPara() { //获取容器 var div = document.getElementById("container"); //创建p元素节点 var p = document.createElement("p"); //创建文本节点 var txt = document.createT...
For data attributes, append the option name to data-, as in data-interval="". Nametypedefaultdescription interval number 5000 The amount of time to delay between automatically cycling an item. If false, carousel will not automatically cycle. pause string | null "hover" If set to "hover", ...