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const colorValidatorEl = document.createElement('div');
/**
* Validates whether the specified color expression
* is supported by the browser’s DOM API and has a valid form.
*
* This utility assigns the color expression to a detached DOM
* element’s color property. If the color expression is valid,
* the DOM API will accept the value.
*
* @param {String} colorExpression color expression rgba, hex, hsla, etc.
*/
export const isValidColorExpression = (colorExpression) => {
colorValidatorEl.style.color = '';
colorValidatorEl.style.color = colorExpression;
return colorValidatorEl.style.color.length > 0;
};
/**
* Check whether a color matches the expected hex format
*
* This matches any hex (0-9 and A-F) value which is either 3 or 6 characters in length
*
* An empty string will return `null` which means that this is neither valid nor invalid.
* This is useful for forms resetting the validation state
*
* @param color string = ''
*
* @returns {null|boolean}
*/
export const validateHexColor = (color = '') => {
if (!color) {
return null;
}
return /^#([0-9A-F]{3}){1,2}$/i.test(color);
};
export function darkModeEnabled() {
const ideDarkThemes = ['dark', 'solarized-dark', 'monokai'];
// eslint-disable-next-line @gitlab/require-i18n-strings
const isWebIde = document.body.dataset.page?.startsWith('ide:');
if (isWebIde) {
return ideDarkThemes.includes(window.gon?.user_color_scheme);
}
return document.body.classList.contains('gl-dark');
}
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