Javascript - Retrieve Data from the DOM

Question

I am trying to get data from the DOM using Javascript.

My tree is: this.caseCodingList.grid.store.__proto__.index

I need to retrieve one of the IDs from the index. It doesn't matter which. Here are various things I have tried, but failed on.

Attempt One:

var grid = this.caseCodingList.grid;
var row = grid.store.getPrototypeOf(data).get(0);

Attempt Two:

var row = grid.store.getData();

Attempe Three:

var index = grid.store.__proto__.index

This one does return something, but I am not able to extract what I want. I also don't know if it will be cross browser compatible. I am developing mainly with Chrome. Results:

{871: 3, {A9A1B512-8E93-4131-B9CD-85C1AEF04722}: 0, {C249D8F2-4561-4657-A6CF-039C0DC89898}: 1, {82FDAFEA-6DCC-483C-BEB7-DDF37818A4C5}: 2}

Any suggestions? Thanks!

```__proto__``` is not how you want to be referencing those values. — Jonathan Rys, Oct 30 '18 at 14:53
@JonathanRys - Yeah I know, but that is the only thing I could get to work. My question is how do I reference them? — staples, Oct 30 '18 at 14:54
See also [__proto__ VS. prototype in JavaScript](https://stackoverflow.com/q/9959727/215552) for more on `__proto__`. — Heretic Monkey, Oct 30 '18 at 14:56
@vzwick Thanks! That answers part of my question. It returns: `{871: 3, {A9A1B512-8E93-4131-B9CD-85C1AEF04722}: 0, {C249D8F2-4561-4657-A6CF-039C0DC89898}: 1, {82FDAFEA-6DCC-483C-BEB7-DDF37818A4C5}: 2}` - How do I retrieve just one of those values? — staples, Oct 30 '18 at 14:57
See https://stackoverflow.com/questions/11922383/access-process-nested-objects-arrays-or-json and https://stackoverflow.com/q/8317982/215552 — Heretic Monkey, Oct 30 '18 at 15:01
@staples - so, any `id` where the corresponding `value` is 0? The first one? The last one? All of them? — vzwick, Oct 30 '18 at 15:02
@vzwick - yes, any id that has the value of 0. In the end though, it doesn't matter which one I use - This is the case for everytime it is used. — staples, Oct 30 '18 at 15:04
What does this have to do with the DOM? Are you sure you know what DOM means …? — misorude, Oct 30 '18 at 15:04

score 1 · Accepted Answer · answered Oct 30 '18 at 15:06

1

const index = grid.store.index;
const idOfObjectWithZeroEntries = Object
    .keys(index)
    .find(x => index[x] === 0);

answered Oct 30 '18 at 15:06

vzwick

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Thank you for your time in understanding my issue! I had to change `const` to `var` to get it to work, but not a big deal. Again, thanks! – staples Oct 30 '18 at 15:12

Javascript - Retrieve Data from the DOM

1 Answers1