How to restrict input field to only input pure numbers in HTML

limit input input box can only enter pure Numbers

1, the onkeyup = "value, value = replace (/ [^ \] d/g,") "

USES the onkeyup event, and has the bug, that is, in the state of Chinese input method, after Chinese characters are input, enter directly, the letter

will be input directly

2, onchange = "value, value = replace (/ [^ \] d/g,") "

USES the onchange event. After input content, only the input loses focus will get the result, and the response

cannot be made when input

3, the oninput = "value, value = replace (/ [^ \] d/g,") "

USES the oninput event, which perfectly solves the above two problems. There are no other problems in the test for the time being.

code example 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8" />
    <title>input</title>
</head>
<body>
    只能输入纯数字的输入框:<input type="text" name="" oninput="value=value.replace(/[^\d]/g,'')">
</body>
</html>

above code has been tested in Google, firefox, baidu, UC, IE11, 360 fast, QQ, Edge browser, please feel free to use,

thanks for qq_38726717, xiao xiao xin feedback in the comments section.

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