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JavaScript: Create an element from a string

JavaScript fundamental (ES6 Syntax): Exercise-250 with Solution

Write a JavaScript program to create an element from a string (without appending it to the document).

If the given string contains multiple elements, only the first one will be returned.

  • Use Document.createElement() to create a new element.
  • Use Element.innerHTML to set its inner HTML to the string supplied as the argument.
  • Use ParentNode.firstElementChild to return the element version of the string.

Sample Solution:

JavaScript Code:

//#Source https://bit.ly/2neWfJ2 
const createElement = str => {
  const el = document.createElement('div');
  el.innerHTML = str;
  return el.firstElementChild;
};

const el = createElement(
  `<div class="container">
    <p>Hello!</p>
  </div>`
);
console.log(el.className); // 'container'

Sample Output:

container

Flowchart:

flowchart: Create an element from a string.

Live Demo:

See the Pen javascript-basic-exercise-250-1 by w3resource (@w3resource) on CodePen.


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JavaScript: Tips of the Day

How to check whether a string contains a substring in JavaScript?

ECMAScript 6 introduced String.prototype.includes:

const string = "foo";
const substring = "oo";

console.log(string.includes(substring));

includes doesn't have Internet Explorer support, though. In ECMAScript 5 or older environments, use String.prototype.indexOf, which returns -1 when a substring cannot be found:

var string = "foo";
var substring = "oo";

console.log(string.indexOf(substring) !== -1);

Ref: https://bit.ly/3fFFgZv