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Despite error cannot read property length of null, the code works


Despite error cannot read property length of null, the code works

By : Patty
Date : November 19 2020, 03:01 PM
I wish did fix the issue. This looks pretty good to me. , You should use safe navigation operator,
code :
<mat-hint align="end">
     {{field_description?.value?.length}} / 50 Chars please.
</mat-hint>


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Userscript works in Firefox, but Chrome gives: Uncaught TypeError: Cannot read property 'length' of null

Userscript works in Firefox, but Chrome gives: Uncaught TypeError: Cannot read property 'length' of null


By : JenifferC
Date : March 29 2020, 07:55 AM
like below fixes the issue That userscript uses @require to load jQuery, which is a good thing.
However, straight Chrome does not support @require (nor much of Greasemonkey's marvelous features).
Cannot read property 'length' of null error

Cannot read property 'length' of null error


By : Lyrol
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further It sounds like you have some automated tests being run against your code, and they are checking how you handle bad input. Your code is not set up to handle anything other than the expected array of numbers, so it fails those tests.
You can solve that in a lot of ways, but something as simple as
code :
if (input === null) {
    return 'Input invalid'; // or something like that
}
// put your for loop here
Cannot read property 'length' of null error in Javascript

Cannot read property 'length' of null error in Javascript


By : user7716954
Date : March 29 2020, 07:55 AM
Any of those help I'm very new to javascript and I am trying to implement an UI where charts are generated in a chatbot-like webpage. The whole project can be found here: https://jsfiddle.net/6cfL8f3b/#&togetherjs=xP8EBTR8SH , Your problem is in here:
code :
 $('<canvas id="chart"'+j+' class="chart"></canvas>')
 //                  ^
 $('<canvas id="chart'+j+'" class="chart"></canvas>')
 //                       ^
Type Error: Cannot read property 'length' of null

Type Error: Cannot read property 'length' of null


By : nobody
Date : March 29 2020, 07:55 AM
will be helpful for those in need I want to run this simple piece of code, basically it changes the label and icon based on the status (string) , Yes can use it like this, it will be more Angular way
code :
  <ng-container *ngIf="container?.length > 0">
ERROR TypeError: Cannot read property 'length' of null in Angular 6

ERROR TypeError: Cannot read property 'length' of null in Angular 6


By : Walle
Date : March 29 2020, 07:55 AM
I wish this helpful for you you need to check for empty data. debug dat first, see if it's empty. nevertheless, you need a check on data to see. calling length of an object without checking for it's value is risky.
code :
 this.CartdataService.get_Selected_Category_Of_Products(this.C_code,
      this.G_code, this.SG_code).subscribe(
        (data : any) => {
         if(data){ 
          this.size = data.length;
          this.CartdataService.prooductCountUnderCGS.next(this.size);
          this.products = data;}

        });
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