topic I can add a graphic to a layer and then "blink" it using setInterval. But I can not add a graphic to a layer and search for it later via icon button, click and "blink" it. The graphic.visible does not seem to work in this, latter instance. Any suggesti in ArcGIS JavaScript Maps SDK Questions

I can add a graphic to a layer and then "blink" it using setInterval. But I can not add a graphic to a layer and search for it later via icon button, click and "blink" it. The graphic.visible does not seem to work in this, latter instance. Any suggesti

EugeneStaten — Fri, 15 May 2020 01:24:17 GMT

I am working with esri gis api for js 4.15 typescript in an Angular 9 application.

This works:

var graphic = new graphic({geometry: point, symbol:sign}):

var layer = new GraphicsLayer({id: 'mylayer'});

view.map.add(layer);

layer.when((layerdone)=>{

setInterval(()=>{

graphic.visible != graphic.visible;

}, 1000);

});

layer.add(graphic);

But this does not:

var glayer = view.map.layers.find((layer)=>{ layer.id === 'mylayer'});

var graphic = glayer.graphics.find():// lets say its found

var count = 0;

var pulser = setInterval(()=>{

graphic.visible != graphic.visible;

if((++count) >= 10){

clearInterval(pulser);

pulser = undefined;

graphic.visible = true;

}

}, 1000);

Re: I can add a graphic to a layer and then "blink" it using setInterval. But I can not add a graphic to a layer and search for it later via icon button, click and "blink" it. The graphic.visible does not seem to work in this, latter instance. Any sugg

EugeneStaten — Fri, 15 May 2020 01:25:58 GMT

Im using esri api for js 4.15.

Re: I can add a graphic to a layer and then "blink" it using setInterval. But I can not add a graphic to a layer and search for it later via icon button, click and "blink" it. The graphic.visible does not seem to work in this, latter instance. Any sugg

RobertScheitlin__GISP — Sun, 12 Dec 2021 06:43:59 GMT

Eugene,

You had a couple of issue in your code. Notice in line 3 I return the boolean value in the find function and again in line 4 I return the boolean value. Then in line 6 I changed the way you were setting the graphics visibility.

        // click event for the button
        flashButton.addEventListener("click", function() {
          var glayer = view.map.layers.find((layer)=>{return layer.id === 'mylayer'});
          var graphic = glayer.graphics.find((gra)=>{return gra.geometry.type === 'polygon'});
          setInterval(()=>{
            graphic.visible = !graphic.visible;
          }, 1000);
        });‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Re: I can add a graphic to a layer and then "blink" it using setInterval. But I can not add a graphic to a layer and search for it later via icon button, click and "blink" it. The graphic.visible does not seem to work in this, latter instance. Any sugg

EugeneStaten — Fri, 15 May 2020 13:18:25 GMT

Thanks Robert,

This works!!! Thanks!!!

Change from != to = ! did the trick.
Cheers to community brain trust.