}//Sets one value}elseif( value !== undefined ) {//单赋值chainable =true;//链式//这种情况也是赋值 如.attr( attributeName, function(index, attr) )传入的value就是一个函数if( !jQuery.isFunction( value ) ) {//如果第四个参数不是函数,raw为trueraw =true; }if( bulk ) {//key为null或...
data = dataUser.get( elem, key ); if ( data !== undefined ) { return data; } // 进入dataAttr函数,查找data-*属性 // Attempt to "discover" the data in // HTML5 custom data-* attrs data = dataAttr( elem, key ); if ( data !== undefined ) { return data; } // We tried ...
}//If applicable, access the attribute via the DOM 0 wayif( nameinelem && notxml && !special ) {if( set ) {//We can't allow the type property to be changed (since it causes problems in IE)//rtype = /(button|input)/i,//button 与 input 不允许修改 type属性if( name === "ty...
$("body").data();// { foo: 52, bar: { isManual: true }, baz: [ 1, 2, 3 ] } Using thedata()method to update data does not affect attributes in the DOM. To set adata-*attribute value, useattr. Prior to jQuery 1.4.3,.data( obj )completely replaced all data. Since jQuery...
You could replace this.value with $(this).val() to access the value of the text input via jQuery, but in that case you wouldn't gain anything. TextText is a node of the Document Object Model (DOM) that represents the textual content of an element or an attribute. Consider the ...
data函数在jQuery中看起来很不起眼, 就像沙滩上一颗平凡的沙子, 但仔细一瞅, 却惊讶的发现data是jQuery中无比重要的一环, 甚至jQuery中各种事件都基于此。 data有什么作用? 在我们平时js编码过程中,我们经常会向DOM元素中添加各种自定义属性,这样有一个弊端。
The only valid values for boolean content attributes are empty string or the full attribute name (e.g. checked="checked").jQuery has historically tried to be helpful here and treated boolean attributes in a special way in the .attr() API:...
The jQuery attr() method is used to get attribute values.The following example demonstrates how to get the value of the href attribute in a link:Example $("button").click(function(){ alert($("#w3s").attr("href")); }); Try it Yourself » The next chapter explains how to set ...
2. $Dom.data(); 代码语言:javascript 复制 data:function(key,value){vari,name,data,elem=this[0],attrs=elem&&elem.attributes;...returndata;...}}, 省略绝大部分代码,可以看到,该方法去读取了元素的 attribute,最后返回的 data 会是在attribute 属性中获得的。所以,第二句打印出来的是{x:"x-value"...
The jQuery attr function sets the attribute value. (Note that jQuery selectors return an array of matched elements, which is why we use the attr function to set the attribute value rather than using the HTML DOM.) The second argument to setInterval is the number of milliseconds between callba...