Using Typescript: How to access a variable beyond the scope of a loop

Question

Using Typescript: How to access a variable beyond the scope of a loop

After creating an array, I need to access the elements outside of the loop. I am aware that they are not in the scope and using 'this.' before them does not grant access.

colIdx = colIdx + this.columns.findIndex(c => c.editable);
this.focusInput(rowIdx, colIdx);
this.autocompletes.toArray().forEach(el => {
   console.log(el);
})

My table contains numerous input fields with autocomplete functionality and suggestion panels. I have a custom method to allow tabbing with the enter key. Initially, tabbing did not close the suggestion panel, resulting in multiple open panels.

The method I created addresses this issue. The first two lines are essential for tabbing with the enter key.

this.autocompletes is a Querylist containing all input elements. By converting them into an array and referencing each element as el, I can execute a closePanel() method on el to close the suggestion panels. However, this approach closes all suggestion panels for all el elements. I need to target and close the specific suggestion panel that the user has focused on.

To achieve this, I must access el outside of the for-loop where it was initially created.

javascript angular typescript frontend

Answer 1

Answer №1

If you want to create an array outside of a loop, you can do so by initializing it first like this: let newArray = [];. Then, within the loop, you can push elements into the array using: newArray.push(element). After the loop, you can access the elements stored in the array.

Answer 2

If you want to create an array outside of a loop, you can do so by initializing it first like this: let newArray = [];. Then, within the loop, you can push elements into the array using: newArray.push(element). After the loop, you can access the elements stored in the array.

Answer 3

Answer №2

A simple solution would involve storing the elements in an array outside of the loop:

items: any[] = [];
index = index + this.columns.findIndex(col => col.editable);
this.setFocus(rowIdx, colIdx);
this.inputs.toArray().forEach(item => {
    console.log(item);
    this.items.push(item);
});

// You can now access and manipulate the elements in the 'items' array.

Answer 4

A simple solution would involve storing the elements in an array outside of the loop:

items: any[] = [];
index = index + this.columns.findIndex(col => col.editable);
this.setFocus(rowIdx, colIdx);
this.inputs.toArray().forEach(item => {
    console.log(item);
    this.items.push(item);
});

// You can now access and manipulate the elements in the 'items' array.

Answer 5

Answer №3

My Querylist, autocompletes, consists of all input elements.

It's important to note that autocompletes will remain unchanged, so you can store it in a local variable during your Init call.

For example, if your form has 4 input elements, it will continue to contain 4 unless they are removed from the DOM. Save it in a local variable when you create or initialize it, depending on how your code is structured.

Here's how you can go about it:

// Avoid calling .toArray repeatedly as the data is constant
elements: Array<any> = this.autocompletes.toArray();

...

elements.forEach(el => {
   // Perform operations on elements here
   // To check if el is focused, you can use something like el.is(":focus")
});

Answer 6

My Querylist, autocompletes, consists of all input elements.

It's important to note that autocompletes will remain unchanged, so you can store it in a local variable during your Init call.

For example, if your form has 4 input elements, it will continue to contain 4 unless they are removed from the DOM. Save it in a local variable when you create or initialize it, depending on how your code is structured.

Here's how you can go about it:

// Avoid calling .toArray repeatedly as the data is constant
elements: Array<any> = this.autocompletes.toArray();

...

elements.forEach(el => {
   // Perform operations on elements here
   // To check if el is focused, you can use something like el.is(":focus")
});

Using Typescript: How to access a variable beyond the scope of a loop

Answer №1

Answer №2

Answer №3

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