通过减少选择器重复来提高javascript代码性能

Question

I am working with javascript and in my project I have those 2 lines: 我正在使用javascript，在我的项目中，我有这两行内容：

$('#content').on('click', 'input[type=submit]', function(){

$('#content').on('click', 'a.removebutton', function(){

I would like to reduce selector duplication for optimization but when I try, the code below It does not work: 我想减少选择器重复进行优化，但是当我尝试时，下面的代码不起作用：

var selector = $('#content').on('click');

selector.('a.removebutton', function(){...

Kindly help me solve this problem. 请帮助我解决这个问题。

Answer 1

var selector = $('#content').on('click', 'input[type=submit]', function() {...});
selector.on('click', 'a.removebutton', function() { ... });

Or a more "fluent" equivalent: 或更“流利”的等效项：

$('#content')
  .on('click', 'input[type=submit]', function() {...})
  .on('click', 'a.removebutton', function() { ... });