Is a created element, considered as a child? [closed] - javascript

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In javascript if you have this by example:
const a = document.createElement("img");
a.src = "test.png";
document.getElementById("parent").appendChild(a);
Will this give true? -> document.getElementById("parent").hasChildNodes();


const a = document.createElement("img");
a.src = "https://www.gravatar.com/avatar/b4185aac47f6262b40dc8f11535a32c0?s=48&d=identicon&r=PG";
document.getElementById("parent").appendChild(a);
console.log(document.getElementById("parent").hasChildNodes());
<div id="parent"></div>

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what is the best way to write this: [closed]

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let valor = value.replace("'","")
valor=valor.replace('"',"")
//or
name=value.replace("'","").replace('"',"")

A better option might be to use a single .replace instead, and use a regular expression to match either ' or ":
const valor = value.replace(/['"]/g, '');

What is the best practice to name this in javascript? [closed]

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In our small team (5 human) we have problem naming this.
Some of us writes _this,some _self,some self,some instance,some i (short for instance)
let _this = this
let _i = this
let _instance = this
let self = this

javascript regex to get the content of a string [closed]

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I have a string
var str="[a54hy 8:45pm],[f57gh 9:20]"
i need to get
[f57gh 9:20pm]
I don't want to use split since the string length can be anything

This worked for me. where id is f57gh
var re='\\['+id + '([a-z0-9: ]+)\\]';
var rematch=RegExp(re,'g');
var mydata=str.match(rematch);
alert(mydata); //[f57gh 9:11am]

regular expression in javascript checking for "asdasd<something>asdsada" [closed]

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how would I check for string
<something> in var string = "some chars <something> somechars"

You can use String.match():
var res = string.match(/<something>/g); // ["<something>"]
If there is no match, the value of res will be null. See example on JSFiddle.

Convert this JavaScript code to jQuery [closed]

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I am new to jQuery, so I'm having trouble solving this. I want this converted to jQuery.
JavaScript:
var el = document.getElementById("box");
el.style.backgroundColor = "#0000000";
var new_el = document.createElement("div");
new_el.innerHTML = "<p>some content</p>";
el.appendChild(new_el);

var $el = $('#box');
$el.css('background-color', '#000000');
$('<div><p>some content</p></div>').appendTo($el);

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