JavaScript limits the way text box input value types

This article mainly introduces the JavaScript limit text box input value type method, involving JavaScript mouse events, keyboard keys and strings related to the operation skills, very practical value, the need for friends can refer to the

The example in this article describes how JavaScript restricts the type of input value for a text box. Share to everyone for your reference. The specific analysis is as follows:

Requirements: All text boxes, can only enter numbers and decimal points, other symbols can not be input;

The point is that I want to limit the user's input, not the commit--that is, if the user enters a number or a decimal point in the text box, the text box will not respond, and if you enter a non-numeric character such as a letter, it does not display the characters you entered.

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