Web developer specializing in React, Vue, and front end development.
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.
Sometimes, we want to use HTML5 Canvas and JavaScript to take in-browser screenshots.
In this article, we’ll look at how to use HTML5 Canvas and JavaScript to take in-browser screenshots.
To use HTML5 Canvas and JavaScript to take in-browser screenshots, we use the getDisplayMedia method.
For instance, we write
<video style="width: 100%; height: 100%; border: 1px black solid" />
to add a video element.
Then we write
const mediaStream = await navigator.mediaDevices.getDisplayMedia();
const video = document.querySelector("video");
video.srcObject = mediaStream;
video.onloadedmetadata = (e) => {
video.play();
video.pause();
};
to call getDisplayMedia to get permission for using the display.
Then we select the video element with querySelector.
And then we set the srcObject to the mediaStream that we get after permission is granted.
Then we set onloadedmetadata to a function that calls play to play the video and pause to pause it once the display is captured.
To use HTML5 Canvas and JavaScript to take in-browser screenshots, we use the getDisplayMedia method.
Sometimes, we want to make HTML text input allow only numeric input.
In this article, we’ll look at how to make HTML text input allow only numeric input.
To make HTML text input allow only numeric input, we set the pattern attribute.
For instance, we write
<input id="numbersOnly" pattern="[0-9.]+" type="text" />
to set the pattern attribute to a regex that validates that the input values are only digits or a decimal point.
To make HTML text input allow only numeric input, we set the pattern attribute.
Sometimes, we want to retrieve an HTML element’s actual width and height with JavaScript.
In this article, we’ll look at how to retrieve an HTML element’s actual width and height with JavaScript.
To retrieve an HTML element’s actual width and height with JavaScript, we use its offsetWidth property.
For instance, we write
const width = document.getElementById("foo").offsetWidth;
to select the element with getElementById.
Then we use its offsetWidth property to get its width in pixels.
To retrieve an HTML element’s actual width and height with JavaScript, we use its offsetWidth property.
Sometimes, we want to prevent buttons from submitting forms with HTML.
In this article, we’ll look at how to prevent buttons from submitting forms with HTML.
To prevent buttons from submitting forms with HTML, we set the type attribute of the button to button.
For instance, we write
<button type="button">Button</button>
to set the type attribute to button to stop it from submitting the form that it’s in.
To prevent buttons from submitting forms with HTML, we set the type attribute of the button to button.