I am using Angular and have a form input field that is meant to be filled with numbers only.
Is there a way to prevent any characters other than numbers from being entered into the form? I want the form to behave as if only integer keys on the keyboard are functioning. For instance, if the current value in my form is 100 and I try to input a character like the plus sign, nothing should happen.
Take a look at this code for my form.
To restrict input to only numbers, you can use the type property like this:
<input type="number" />
This will ensure that only integers are accepted.
To ensure only specific keys are allowed in the input field, you can set up a subscription to the keydown event:
// Add to your HTML template
<input (keydown)='onKeyDown($event)' ...>
// Implement in your component
onKeyDown(event: KeyboardEvent) {
if (!event.key.match(/[0-9]{1}|Delete|ArrowUp|ArrowDown|ArrowLeft|ArrowRight|Backspace/)) {
event.preventDefault();
}
}
Remember to account for navigation and delete keys when restricting input.
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