我正在尝试在输入字段中禁用退格键

Question

In this example I want to disable the backspace key on the input field.在此示例中，我想禁用输入字段上的退格键。

I am passing the $event in my template as:我将模板中的 $event 传递为：

<input (input)="onInput($event)">

while in my app.component.ts file the function is like this:而在我的 app.component.ts 文件中，function 是这样的：

onInput(e:KeyboardEvent){
if(e.keycode===8){
e.preventDefault();
}else{
console.log(e.which);
}

Also Typescript is complaining about e.keycode and e.which as being deprecated. Typescript 也在抱怨 e.keycode 和 e.which 已被弃用。

Edit: I forgot to add double quotes in the question on: (input)="onInput()"编辑：我忘了在问题中添加双引号： (input)="onInput()"

Answer 1

You have to change the output of input element from (input) to (keydown)您必须将输入元素的 output 从(input)更改为(keydown)