Develop Reference

How do I create a custom javascript variable that selects part of an already existing javascript variable?

I am trying to create a custom javascript variable in GTM that returns part of a javascript variable that already exists.
Variable that already exists: window.ShopifyAnalytics.meta.product.variants.0.name
returns this: "Bamboo Basic String - Schwarz - S"
However I want to code a custom javascript variable to just return the Schwarz part, is this possible? If so what is the code that I would need?
Please can someone let me know what code to put into GTM to create this variable?
TIA

If all names are pretty much the same you could use split to get that part of string and then remove whitespaces. It would look like this:
window.ShopifyAnalytics.meta.product.variants.0.name.split('-')[1].replace(/
/g,'');

If the already existing variable is always structured the same way you could do something like this:
let variable = window.ShopifyAnalytics.meta.product.variants.0.name.split('-')
Then by calling varaible[1] you get the 'Schwartz' part of the variable.

If you want a return value you can use a function like the following and call it wherever you want.
Simply make sure to pass the correct argument content
// Declaring a function getColor that returns the second element in the list,
// trimmed (without spaces before and after)
const getColor = (content) => {
return content.split('-')[1].trim();
}
const test = "Bamboo Basic String - Schwarz - S";
console.log(getColor(test));
//console.log(getColor(window.ShopifyAnalytics.meta.product.variants.0.name));

You could split the string on the hypens (-) like this:
const productName = window.ShopifyAnalytics.meta.product.variants.0.name;
const part = productName.split(' - ')[1];
Assuming you have a consistent format, and you always want the second part after that hyphen.
split will separate parts of a string into an array where it finds a match for the argument. The first index [0] will be the product name, the second [1] will be the part you're looking for.
This could cause issues if you have a product name with a - in it too though so use with care!
If it needs to be an anonymous function for GTM, you could try the following (though I'm not a GTM expert):
function () {
const productName = window.ShopifyAnalytics.meta.product.variants.0.name;
return productName.split(' - ')[1] || 'Unknown';
}

Applying a variable to an element's style property with js

Sorry if this question has already been asked. If so, could someone please direct me to the thread(s)? I have not found any existing ones so far.
But my question revolves around this type of action:
var Product_Linky = document.getElementById("Product_Link_Container");
Product_Linky.style.position.left= 12px;
A literal is being applied to the attribute with the indicated units. But...can a variable be applied and if so, how would the units be specified?
The following code is not written properly, but it shows an example of the problem I have:
var Product_Linky = document.getElementById("Product_Link_Container");
Product_Linky.style.position.left= 'MyVariable_x'px ;
If a variable can be used, what is the correct syntax to include the units?
Best regards!

There's a similar question already, but to answer your question this will work:
var variable_Length = 5;
var Product_Linky = document.getElementById("Product_Link_Container");
Product_Linky.style.position.left= variable_Length + 'px' ;

Try using template Literals!
In JavaScript, if you want to make a variable "fit in" to a string, you an use the following syntax:
var num = 12;
var myString = `My number is ${num}.`;
console.log(myString);
will log
My number is 12.
One important note on this: you cannot use regular quotation marks to enclose the string. You must use the backtick:
`
(it should be right above your tab key). Otherwise, this will not work.
For more information, check out the MDN Web Docs!
For an example, check out this Codepen I made! (Try changing the myHeight variable's value.)
I hope that helps!

Do this, my friend. It's called ES6 template literal
Product_Linky.style.position.left= `${MyVariable_x}px` ;
Or you do the String concatenation like this
Product_Linky.style.position.left= MyVariable_x + 'px' ;

Treat String as JavaScript and output variables

Assume I have string '${hello} ${love} times'
I would like to replace hello by the variable named hello and love by the variable named love without removing times. I am using ReactJS with JSX.
My attempt is just removing the $, { and } from the string and then deal with it.
var cut = this.props.string.split(" ");
var one = cut[0].split("{");
var two = one[1].split("}");
var thin = this.var[two[0]];
and then use thin

Your question is completely unclear... Do you know how ES6 template literals work? You have to use backticks to enable string interpolation, not regular quotes ('' or "").
Is this what you are trying to do?
let hello = 'Hello',
love = 'LOVE';
console.log(`${hello} ${love} times`);

Escaping javascript entities in js?

I want to escape javascript entities on client side. For example :-
If my input string is tes"t result should be tes\"t
Is there any inbuilt function provided by jquery for this ?

This is a really crazy, almost stupid shot in the dark on my part, but...
If you're using a server-side language like PHP to output variables' contents into JavaScript, you should use json_encode as this handles ALL escaping for you, regardless of the type of variable.
On the other hand, if you're (I really hope you're not) doing something like this:
var input = "test"t";
And trying to escape that properly while in JavaScript... that's not going to work. It's a syntax error. You need to escape your literals manually.

Kevin van Zonneveld provide a JavaScript equivalent of PHP’s addslashes here :
http://phpjs.org/functions/addslashes/
function addslashes(str) {
// example 1: addslashes("kevin's birthday");
// returns 1: "kevin\\'s birthday"
return (str + '')
.replace(/[\\"']/g, '\\$&')
.replace(/\u0000/g, '\\0');
}
Based on this function, I guess you might want to add this function to prototype of the String like this.
if (!String.prototype.addslashes) {
String.prototype.addslashes = function () {
return this.replace(/[\\"']/g, '\\$&').replace(/\u0000/g, '\\0');
};
}
var str = 'tes"t';
alert(str.addslashes()); // shows 'tes\"t'
DEMO: http://jsfiddle.net/naokiota/6F6aN/6/
Hope this helps.

Replace Word Within Word - Javascript

I need to get a id from a html element and replace a part of the word. For example:
HTML
<input type="checkbox" id="facebookCheckbox"></div>
JavaScript
var x = document.getElementById("facebookCheckbox");
var name = x.id;
name.replace("Checkbox","");
This obviously does not work because the replacing word has to be standalone for it to be replaced. Is there a different way of doing this?
I'm looking for purely javascript no jQuery
Thank you!

name.replace("Checkbox","");
This obviously does not work because the replacing word has to be standalone for it to be replaced.
No, it does work and there's no need to be "standalone" - any part of the string can be matched. Only you did nothing with the result of the operation:
console.log(name.replace("Checkbox",""));
// or
name = name.replace("Checkbox","");
// or assign back to x.id maybe?

You are creating a copy of string when replacing, so you must assign the result of .replace() back to x.id.
var x = document.getElementById("facebookCheckbox");
x.id = x.id.replace("Checkbox","");

this is not going to work in this way. However you can have a marker kind of character by which you can break the name into array and implement the logic. For example:
var x = document.getElementById("facebook_Checkbox");
//Note I have added underscore in the Id
var name = x.id;
var arr=name.split("_");
//Now you have Checkbox and Facebook as string objects (part of array) and you can use them
name=arr[0]
I hope it will solve the purpose.