ionicons
Version:
Premium icons for Ionic.
46 lines (45 loc) • 1.48 kB
JavaScript
import { isStr } from "./utils";
export const validateContent = (svgContent) => {
const div = document.createElement('div');
div.innerHTML = svgContent;
// setup this way to ensure it works on our buddy IE
for (let i = div.childNodes.length - 1; i >= 0; i--) {
if (div.childNodes[i].nodeName.toLowerCase() !== 'svg') {
div.removeChild(div.childNodes[i]);
}
}
// must only have 1 root element
const svgElm = div.firstElementChild;
if (svgElm && svgElm.nodeName.toLowerCase() === 'svg') {
const svgClass = svgElm.getAttribute('class') || '';
svgElm.setAttribute('class', (svgClass + ' s-ion-icon').trim());
// root element must be an svg
// lets double check we've got valid elements
// do not allow scripts
if (isValid(svgElm)) {
return div.innerHTML;
}
}
return '';
};
export const isValid = (elm) => {
if (elm.nodeType === 1) {
if (elm.nodeName.toLowerCase() === 'script') {
return false;
}
for (let i = 0; i < elm.attributes.length; i++) {
const name = elm.attributes[i].name;
if (isStr(name) && name.toLowerCase().indexOf('on') === 0) {
return false;
}
}
for (let i = 0; i < elm.childNodes.length; i++) {
if (!isValid(elm.childNodes[i])) {
return false;
}
}
}
return true;
};
export const isSvgDataUrl = (url) => url.startsWith('data:image/svg+xml');
export const isEncodedDataUrl = (url) => url.indexOf(';utf8,') !== -1;