Summary of some restrictive controls on text boxes~~_Form special effects

1. Restrict the text box from inputting Chinese:
In the past, I often used judgment to write, such as:

Copy code The code is as follows:

function nocn(obj)
{
for(i=0;i{
var c = document.getElementsByName("Text1")[0].value.substr(i,1);
var ts = escape(c);
if(ts.substring(0,2) == "%u")
{
document.getElementsByName("Text1")[0].value = "";
alert("Not possible here Enter Chinese/full-width characters");
}
}
}

But few people use ime-mode:disabled (implemented with css Close the text box input method)
ime-mode
Syntax:
ime-mode: auto | active | inactive | disabled
Value:
auto: Default value. Does not affect the status of IME. The same as when the ime-mode attribute is not specified
active: specifies all characters entered using IME. That is to activate the local language input method. The user can still deactivate the IME
inactive : Specifies all characters that are not entered using the IME. That is to activate non-native languages. The user can still deactivate the IME
disabled : Disable the IME completely. For focused controls (such as input boxes), the user cannot activate the IME

Then:

ime-mode:disabled is to disable the input method.
Extension:

Copy code The code is as follows:

Think about it yourself~
2. .Restrict the text box from pasting:
Generally when we see this, we will have this idea: disable the Ctrl key and C key, and then disable the right click, you can perfectly disable the paste function.
Then you need to write a JS file (this JS file has relevant content on this blog)
In fact, onpaste="return false;" can perfectly disable pasting, and be aware that it disables pasting. function, so using this attribute, the user cannot paste content even if the right click is not disabled.

Then:

Copy code The code is as follows:

onpaste is disabled for pasting.