What is the Minimum Permissible Value for setTimeout Across Different Browsers?

Determining the Minimum Permissible Value for setTimeout

Browsers implement varying minimum values for the setTimeout function, which affects the execution timing of JavaScript functions. Understanding these minimums is crucial for ensuring compatibility across browsers.

Modern Browsers and Minimum setTimeout Value

For modern browsers, such as Chrome, Firefox, Safari, and Edge, the minimum timeout value for setTimeout is typically 4 milliseconds. This is specified in the HTML5 specification and is consistent among these browsers.

Older Browsers and Minimum setTimeout Value

Older browsers, such as Internet Explorer and Firefox versions before 5.0, have a higher minimum timeout value. In these browsers, the minimum setTimeout value is usually 10 milliseconds. This was the case prior to the introduction of HTML5.

Recommendations and Compatibility

To ensure compatibility with both modern and older browsers, it's advisable to use a minimum timeout value of 10 milliseconds. While HTML5 browsers support a lower minimum, maintaining compatibility with older browsers is prudent.

Example Usage

The following code demonstrates the use of a minimum timeout value of 10 milliseconds, ensuring compatibility with both modern and older browsers:

var minValue = 10;
if (typeof callback == 'function') {
  setTimeout(callback, minValue);
}

By adhering to these minimum timeout values, developers can ensure reliable and consistent execution of JavaScript functions across various browsers.

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