Introduction to the difference between $this and $(this) in jQuery (you can understand it at a glance)_jquery
Release: 2016-05-16 15:51:29
Original
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// this其实是一个Html 元素。
// $this 只是个变量名,加$是为说明其是个jquery对象。
// 而$(this)是个转换,将this表示的dom对象转为jquery对象,这样就可以使用jquery提供的方法操作。
(function($){
$.fn.hilight = function(options){
debug(this);
var defaults = {
foreground: 'red',
background: 'yellow'
};
var opts = $.extend({}, $.fn.hilight.defaults, options);
return this.each(function() {
// this其实是一个Html 元素。
// $this 只是个变量名,加$是为说明其是个jquery对象。
// 而$(this)是个转换,将this表示的dom对象转为jquery对象,这样就可以使用jquery提供的方法操作。
$this = $(this);
// build element specific options
var o = $.meta ? $.extend({}, opts, $this.data()) : opts;
// update element styles
$this.css({
backgroundColor: o.background,
color: o.foreground
});
var markup = $this.html();
// call our format function
markup = $.fn.hilight.format(markup);
$this.html(markup);
});
};
// define our format function
$.fn.hilight.format = function(txt) {
return '<strong>' + txt + '</strong>';
};
// 插件的defaults
$.fn.hilight.defaults = {
foreground: 'red',
background: 'yellow'
};
function debug($obj) {
if (window.console && window.console.log){
window.console.log('hilight selection count: ' + $obj.size());
}
};
})(jQuery)
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