JavaScript: Efficiently Replacing Multiple Text Instances

Question

JavaScript: Efficiently Replacing Multiple Text Instances

To ensure that users do not input multiple empty paragraphs in the text editor, I have found a method to eliminate a single   from the text within the editor message.

var str = content.replace('<p><br></p>', '');

Nevertheless, my goal is to strip out all instances of the pattern  , such as

<p><br></p><p><br></p>Lorem Ipsum is simply dummy text<p><br></p><p><br></p><p><br></p>

. Is there a more efficient way, perhaps using regex or another method, to achieve this with a single operation?

javascript

Answer 1

Answer №1

the substitute function will specifically eliminate the sequence ' '.

If you want to delete elements with no content (or only whitespace content), it's more effective to use a proper DOM-method. The following code snippet illustrates this for various hypothetical elements within a simulated document body.

document.body.innerHTML = `
  <p><br></p>
  <p>
   <br>
  </p>
  <p>Lorem Ipsum is simply dummy text</p>
  <p>
  
   <br>
  
  </p>
  <p><br>        </p>
  <p><br></p>
  <p> <br>
    <p><br></p>
  </p>`;
document.querySelectorAll("p").forEach(el => {
  if (!el.textContent.trim()) {
    el.parentNode.removeChild(el)
  };
});
console.log(document.body.innerHTML.trim());

Answer 2

the substitute function will specifically eliminate the sequence ' '.

If you want to delete elements with no content (or only whitespace content), it's more effective to use a proper DOM-method. The following code snippet illustrates this for various hypothetical elements within a simulated document body.

document.body.innerHTML = `
  <p><br></p>
  <p>
   <br>
  </p>
  <p>Lorem Ipsum is simply dummy text</p>
  <p>
  
   <br>
  
  </p>
  <p><br>        </p>
  <p><br></p>
  <p> <br>
    <p><br></p>
  </p>`;
document.querySelectorAll("p").forEach(el => {
  if (!el.textContent.trim()) {
    el.parentNode.removeChild(el)
  };
});
console.log(document.body.innerHTML.trim());

Answer 3

Answer №2

Implement a regular expression to substitute the text.

text.replace(/<p><br><\/p>/g, "");

Answer 4

Implement a regular expression to substitute the text.

text.replace(/<p><br><\/p>/g, "");

JavaScript: Efficiently Replacing Multiple Text Instances

Answer №1

Answer №2

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