Web developer specializing in React, Vue, and front end development.
To disable HTML button using JavaScript, we set the button’s disabled property.
For instance, we write
document.getElementById("btnPlaceOrder").disabled = true;
to select the button with getElementById.
Then we disable the button by setting is disabled property to true.
To stop Enter key from triggering button click with JavaScript, we set the type attribute of the button to button.
For instance, we write
<button type="button">click me</button>
to add a button with type attribute button to stop pressing enter from trigger a button click.
To get browser width using JavaScript, we can get the max of a few values.
For instance, we write
const getWidth = () => {
return Math.max(
document.body.scrollWidth,
document.documentElement.scrollWidth,
document.body.offsetWidth,
document.documentElement.offsetWidth,
document.documentElement.clientWidth
);
};
to define the getWidth function.
In it, we call Math.max to get the max of document.body.scrollWidth, document.documentElement.scrollWidth, document.body.offsetWidth,
document.documentElement.offsetWidth, and document.documentElement.clientWidth to get the width of the browser
To ensure a select form field is submitted when it is disabled with HTML, we set the name of a hidden input to the same name as the disabled select element.
For instance, we write
<select name="myselect" disabled="disabled">
<option value="myselectedvalue" selected="selected">My Value</option>
....
</select>
<input type="hidden" name="myselect" value="myselectedvalue" />
to add a select and a hidden input element.
We set the name attribute of both elements to myselect.
And then the value of the hidden input will be submitted to the server.
To get the information from a meta tag with JavaScript, we use the content property.
For instance, we write
const content = document.head.querySelector(
"[property~=video][content]"
).content;
to select the meta element with the property attribute containing video and has the content attribute with document.head..querySelector from the head element.
Then we get the content attribute from the selected element with the content property.