Javascript controls input to only allow various specified input content

1. Only numbers are allowed.

<input name="username" type="text"onkeyup="value=this.value.replace(/\D+/g,'')">

2. Only English letters, numbers, and underscores (_) are allowed)

<input name="username" type="text"style="ime-mode:disabled"><input name="username" type="text"onkeyup="value=value.replace(/[^\w\.\/]/ig,'')">

3. Only English letters, numbers, and = @ # are allowed @#

<input name="username" type="text" onkeyup="value=value.replace(/[^\w=@#]|_/ig,'')">

4. Only Chinese characters are allowed

<input name="username" type="text"onkeyup="value=value.replace(/[^\u4E00-\u9FA5]/g,'')">

1. Only numbers are allowed.

<input name="username" type="text"onkeyup="value=this.value.replace(/\D+/g,'')">

2. Only English letters, numbers, and underscores (_) are allowed)

<input name="username" type="text"style="ime-mode:disabled"><input name="username" type="text"onkeyup="value=value.replace(/[^\w\.\/]/ig,'')">

3. Only English letters, numbers, and = @ # are allowed @#

<input name="username" type="text"onkeyup="value=value.replace(/[^\w=@#]|_/ig,'')">

4. Only Chinese characters are allowed

<input name="username" type="text" onkeyup="value=value.replace(/[^\u4E00-\u9FA5]/g,'')">

Only numbers are allowed: "^ [0-9] * $ ".
Only n digits can be entered: "^ \ d {n} $ ".
You can only enter at least n digits: "^ \ d {n,} $ ".

Only m ~ can be input ~ N-digit :. "^ \ D {m, n} $"
Only numbers starting with zero and non-zero can be entered: "^ (0 | [1-9] [0-9] *) $ ".

Only positive numbers with two decimal places can be entered: "^ [0-9] + (. [0-9] {2 })? $ ".

Only 1 ~ Positive number of three decimal places: "^ [0-9] + (. [0-9] {1, 3 })? $ ".
Only a non-zero positive integer can be entered: "^ \ +? [1-9] [0-9] * $ ".

Only a non-zero negative integer can be entered: "^ \-[1-9] [] 0-9" * $.
Only 3 characters can be entered: "^. {3} $ ".

You can only enter A string consisting of 26 English letters: "^ [A-Za-z] + $ ".
You can only enter a string consisting of 26 uppercase letters: "^ [A-Z] + $ ".

You can only enter a string consisting of 26 lower-case English letters: "^ [a-z] + $ ".
You can only enter a string consisting of a number and 26 English letters: "^ [A-Za-z0-9] + $ ".

You can only enter a string consisting of digits, 26 English letters, or underscores (_): "^ \ w + $ ".

Verify the User Password: "^ [a-zA-Z] \ w {5, 17} $". The correct format is: start with a letter, with a length of 6 ~ It can only contain characters, numbers, and underscores.

Check whether ^ % & ',; =? $ \ "And other characters:" [^ % & ',; =? $ \ X22] + ".

Only Chinese characters can be entered: "^ [\ u4e00-\ u9fa5] {0,} $"

Only numbers and decimal points can be entered. paste-resistant:

<input type=""text" onkeyup="value=value.replace(/[^0-9.]/g,''),dxfqlld();" onpaste="value=value.replace(/[^0-9.]/g,'')" oncontextmenu="value=value.replace(/[^0-9.]/g,'')" />