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Parse html style string for a react component
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/** | |
* @function parseStyles | |
* Parses a string of inline styles into a javascript object with casing for react | |
* | |
* @param {string} styles | |
* @returns {Object} | |
*/ | |
const parseStyles = styles => styles | |
.split(';') | |
.filter(style => style.split(':')[0] && style.split(':')[1]) | |
.map(style => [ | |
style.split(':')[0].trim().replace(/-./g, c => c.substr(1).toUpperCase()), | |
style.split(':')[1].trim() | |
]) | |
.reduce((styleObj, style) => ({ | |
...styleObj, | |
[style[0]]: style[1], | |
}), {}); |
This code will significantly improve the performance :
const convertStylesStringToObject = stringStyles => typeof stringStyles === 'string' ? stringStyles
.split(';')
.reduce((acc, style) => {
const colonPosition = style.indexOf(':')
if (colonPosition === -1) {
return acc
}
const
camelCaseProperty = style
.substr(0, colonPosition)
.trim()
.replace(/^-ms-/, 'ms-')
.replace(/-./g, c => c.substr(1).toUpperCase()),
value = style.substr(colonPosition + 1).trim()
return value ? {...acc, [camelCaseProperty]: value} : acc
}, {}) : {}
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In https://reactjs.org/docs/dom-elements.html#style written:
...Vendor prefixes other than ms should begin with a capital letter. ...
So:
style.split(':')[0].trim().replace(/-./g, c => c.substr(1).toUpperCase())
must be replaced with:
style.split(':')[0].trim().replace(/^-ms-/, 'ms-').replace(/-./g, c => c.substr(1).toUpperCase())