没区别，click是bind("click")的快捷方式，click的实现就是bind("click")
jQuery.each( ("blur focus focusin focusout load resize scroll unload click dblclick " +
"mousedown mouseup mousemove mouseover mouseout mouseenter mouseleave " +
"change select submit keydown keypress keyup error contextmenu").split(" "), function( i, name ) {
// Handle event binding
jQuery.fn[ name ] = function( data, fn ) {
return arguments.length > 0 ?
this.on( name, null, data, fn ) :
this.trigger( name );
};
});
源码里可以看到，类似的还有blur focus mousedown之类的，现在的版本都用on了，而非bind，道理都一样的
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