这是代码。使用数字和加号+在电话字段中正常工作。您将必须在 keydown 函数上实现代码。定位特定电话字段的 id/class 并使用 keydown 功能。
//allows only these keys
// backspace, delete, tab, escape, and enter
if ( event.keyCode == 107 || event.keyCode == 46 || event.keyCode == 8 || event.keyCode == 9 || event.keyCode == 27 || event.keyCode == 13 ||
// Ctrl+A
(event.keyCode == 65 && event.ctrlKey === true) ||
// home, end, left, right
(event.keyCode >= 35 && event.keyCode <= 39)) {
return;
}
else {
// Ensure that it is a number and stop the keypress
if (event.shiftKey || (event.keyCode < 48 || event.keyCode > 57) && (event.keyCode < 96 || event.keyCode > 105 )) {
event.preventDefault();
}
}