本文介紹了為什么 html 輸入類型為“數(shù)字"?允許在字段中輸入字母“e"?的處理方法，對大家解決問題具有一定的參考價值，需要的朋友們下面隨著小編來一起學(xué)習(xí)吧！
問題描述
I have the following html5 input element:
<input type="number">
Why does this input allow for the character 'e' to be entered in the input field? No other alphabet character is able to be entered (as expected)
Using chrome v. 44.0.2403.107
Example below to see what I mean.
<input type="number">
解決方案
Because that's exactly how the spec says it should work. The number input can accept floating-point numbers, including negative symbols and the e or E character (where the exponent is the number after the e or E):
A floating-point number consists of the following parts, in exactly the following order:
- Optionally, the first character may be a "
-" character.- One or more characters in the range "
0—9".- Optionally, the following parts, in exactly the following order:
- a "
." character- one or more characters in the range "
0—9"- Optionally, the following parts, in exactly the following order:
- a "
e" character or "E" character- optionally, a "
-" character or "+" character- One or more characters in the range "
0—9".
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