check if clipboard content is empty using @ionic-native/clipboard

Question

i want to check if the clipboard content is empty so if it is, i show an alert to the user saying the clipboard is empty else i assign the clipboard content to the variable content

this is what i have tried but it doesn't show the alert

public pastetoinput(){
    this.clipboard.paste().then(
        (resolve: string) => {
            if(resolve == "" || resolve == null){
                 alert("clipboard is empty");
            }else{
                 var content = resolve
            }
        },
        (reject: string) => {
            console.error('Error: ' + reject);
        }
    );
}

score 0 · Answer 1 · answered Aug 29 '19 at 07:45

0

Have you injected the Clipboard provider in your constructor? Maybe you should also check if the resolve variable would be undefined instead of null.

Code Example:

import { Clipboard } from '@ionic-native/clipboard/ngx';

constructor(private clipboard: Clipboard) { }

public pastetoinput(){
    this.clipboard.paste().then(
        (resolve: string) => {
            if(resolve === "" || resolve === null || resolve === undefined){
                 alert("clipboard is empty");
            }else{
                 var content = resolve
            }
        },
        (reject: string) => {
            console.error('Error: ' + reject);
        }
    );
}

answered Aug 29 '19 at 07:45

SparkFountain

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1

If you check `resolve == null` it will check for the `undefined` and `null` as well :) so no need to write `resolve === undefined` – Yash Rami Aug 29 '19 at 09:38
@YashRami You are right, it works if you use the *abstract equality operator* instead of `===` (detailed explanation: https://stackoverflow.com/a/2647888/2764486) – SparkFountain Aug 29 '19 at 10:55
Spark Fountain Yes Mate :) – Yash Rami Aug 29 '19 at 10:58

check if clipboard content is empty using @ionic-native/clipboard

1 Answers1