topic Re: Typescript error with definitionExpression in ArcGIS JavaScript Maps SDK Questions

Typescript error with definitionExpression

KenBuja — Tue, 08 Dec 2020 23:06:09 GMT

I want to apply a definitionExpression to a feature layer after it's been created in my TypeScript project with this code.

const exp = 'OBJECTID = 1'; regionLayer.definitionExpression(exp);

but I am getting the error

Error TS2349 (TS) This expression is not callable. Type 'String' has no call signatures

If I add the property when I create the feature layer, I don't get this error

const test = 'OBJECTID = 1'; const regionLayer = new FeatureLayer({ url: url, definitionExpression: test, outFields: ['*'] });

but I have the change the definitionExpression when the user makes certain choices.

What is causing this error?

JohnGrayson — Wed, 09 Dec 2020 00:09:40 GMT

Ken, I believe this is a String property and not a method; maybe try this:

const exp = 'OBJECTID = 1'; regionLayer.definitionExpression = exp;

KenBuja — Wed, 09 Dec 2020 00:24:06 GMT

Thanks John! What a silly mistake...