I am currently in the process of designing a high contrast version of a website. The code below is effective for Internet Explorer and Edge, but I am looking to specifically detect Firefox.
@media screen and (-ms-high-contrast: active) {}
Does anyone have recommendations on how to detect both high contrast mode and specifically identify Firefox using JavaScript?
Looking to customize a high contrast version of a website, I am in need of a way to detect this for Firefox.
The media query you are currently using for high contrast,
@media screen and (-ms-high-contrast: active) {}
is only effective for IE and Edge Legacy browsers. (The -ms prefix is specific to Microsoft.)
highContrastMode = () => {
const testDiv = document.createElement('div');
testDiv.style.color = 'rgb(200, 100, 50)';
document.body.appendChild(testDiv);
const color = document.defaultView!.getComputedStyle(testDiv, null).color;
document.body.removeChild(testDiv);
return color !== 'rgb(200, 100, 50)' ? true : false;
}
const isFirefox = window.navigator.userAgent.indexOf('Firefox') > -1;
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