How to check for empty string in html

Asked Nov 04 '21 at 11:08

Active Nov 04 '21 at 11:12

Viewed 46 times

i have the below posted radio button, and i would like to make it disabled according to the condition posted below.my question is, one of the conditions the makes the button disabled is

iAreaOfCoverageForThresholdPasser.customizedThresholdValue

i want to test it if it is equal to empty string "" how can i do that?

html:

<button
                    id = "idSubmitButton"
                    [disabled]="!form.form.valid || (!iAreaOfCoverageForThresholdPasser.threshold3 && !iAreaOfCoverageForThresholdPasser.threshold10 && !iAreaOfCoverageForThresholdPasser.threshold15 && !iAreaOfCoverageForThresholdPasser.threshold20 && (!iAreaOfCoverageForThresholdPasser.customizedThreshold||!iAreaOfCoverageForThresholdPasser.customizedThresholdValue == )) || (!iOperationPasser.averageHeight && !iOperationPasser.areaOfCoverage)"
                    class="btn btn-outline"
                    type="button"
                    (click)="submit()"
                >

edited Nov 04 '21 at 11:12

asked Nov 04 '21 at 11:08

LetsamrIt

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Get rid of the `== ??` - you already check for it because of the `!` in front. – CherryDT Nov 04 '21 at 11:09
@Liam no it did not,because it is about javascript – LetsamrIt Nov 04 '21 at 11:18
1

You do know angular uses JS right? `!form.form.valid` **is** javascript and Typescript is a superset of JS that gets compiled down to JS – Liam Nov 04 '21 at 11:19

How to check for empty string in html

0 Answers0