Uncaught TypeError: Cannot call method 'replace' of undefined

问题

$(this).find("input[name=amount]").val($(this).find("input[name=amount]").val().replace('$', ''));

Keep getting this error on my developer tools. I just want to replace the character $ with nothing which is ''

Thoughts?

回答1:

Your error just says that there is no element that matches your selector, so element.val() is returning undefined, which has no replace method. Try debugging it and console.log() at each step.

Also, you don't need to search for the element twice. Just store it in a variable:

var $input = $(this).find('input[name="amount"]');
$input.val($input.val().replace('$', ''));

来源：https://stackoverflow.com/questions/8918009/uncaught-typeerror-cannot-call-method-replace-of-undefined