Category: JavaScript Answers

Sometimes, we want to select all text in HTML text input when clicked with JavaScript.

In this article, we’ll look at how to select all text in HTML text input when clicked with JavaScript.

How to select all text in HTML text input when clicked with JavaScript?

To select all text in HTML text input when clicked with JavaScript, we call the input’s select method on click.

For instance, we write

<label for="userid">User ID</label>
<input onClick="this.select();" value="Please enter the user ID" id="userid" />

to call this.select when we click on the input to select all the text in it when we click on the input.

Conclusion

To select all text in HTML text input when clicked with JavaScript, we call the input’s select method on click.

Sometimes, we want to capture HTML Canvas as gif/jpg/png/pdf with JavaScript.

In this article, we’ll look at how to capture HTML Canvas as gif/jpg/png/pdf with JavaScript.

How to capture HTML Canvas as gif/jpg/png/pdf with JavaScript?

To capture HTML Canvas as gif/jpg/png/pdf with JavaScript, we call the toDataURL method.

For instance, we write

const canvas = document.getElementById("mycanvas");
const image = canvas.toDataURL("image/png");

to get the canvas with getElementById.

Then we call toDataURL with 'image/png' to return a base64 string with the canvas content in png format.

Conclusion

To capture HTML Canvas as gif/jpg/png/pdf with JavaScript, we call the toDataURL method.

Sometimes, we want to strip HTML from text with JavaScript

In this article, we’ll look at how to strip HTML from text with JavaScript.

How to strip HTML from text with JavaScript?

To strip HTML from text with JavaScript, we call parseFromString to parse the HTML string.

Then we get its text content.

For instance, we write

const strip = (html) => {
  const doc = new DOMParser().parseFromString(html, "text/html");
  return doc.body.textContent || "";
};

to define the strip function.

In it, we call parseFromString to parse the html string into a DOM object.

Then we get the text from the DOM object with textContent.

Conclusion

To strip HTML from text with JavaScript, we call parseFromString to parse the HTML string.

Then we get its text content.

Sometimes, we want to make JavaScript execute after page load.

In this article, we’ll look at how to make JavaScript execute after page load.

How to make JavaScript execute after page load?

To make JavaScript execute after page load, we use the defer attribute.

For instance, we write

<script src="script.js" defer></script>

to add the defer attribute to the script tag to make script.js load after the page is loaded.

Conclusion

To make JavaScript execute after page load, we use the defer attribute.

To scroll to bottom of div with JavaScript, we set scrollTop to scrollHeight.

For instance, we write

const objDiv = document.getElementById("your_div");
objDiv.scrollTop = objDiv.scrollHeight;

to get the div with getElementById.

Then we set its scrollTop property to its scrollHeight value to scroll to the bottom.