You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 

76 lines
2.5 KiB

"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.getLabelContent = getLabelContent;
exports.getLabels = getLabels;
exports.getRealLabels = getRealLabels;
var _helpers = require("./helpers");
const labelledNodeNames = ['button', 'meter', 'output', 'progress', 'select', 'textarea', 'input'];
function getTextContent(node) {
if (labelledNodeNames.includes(node.nodeName.toLowerCase())) {
return '';
}
if (node.nodeType === _helpers.TEXT_NODE) return node.textContent;
return Array.from(node.childNodes).map(childNode => getTextContent(childNode)).join('');
}
function getLabelContent(element) {
let textContent;
if (element.tagName.toLowerCase() === 'label') {
textContent = getTextContent(element);
} else {
textContent = element.value || element.textContent;
}
return textContent;
} // Based on https://github.com/eps1lon/dom-accessibility-api/pull/352
function getRealLabels(element) {
// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition -- types are not aware of older browsers that don't implement `labels`
if (element.labels !== undefined) {
var _labels;
return (_labels = element.labels) != null ? _labels : [];
}
if (!isLabelable(element)) return [];
const labels = element.ownerDocument.querySelectorAll('label');
return Array.from(labels).filter(label => label.control === element);
}
function isLabelable(element) {
return /BUTTON|METER|OUTPUT|PROGRESS|SELECT|TEXTAREA/.test(element.tagName) || element.tagName === 'INPUT' && element.getAttribute('type') !== 'hidden';
}
function getLabels(container, element, {
selector = '*'
} = {}) {
const ariaLabelledBy = element.getAttribute('aria-labelledby');
const labelsId = ariaLabelledBy ? ariaLabelledBy.split(' ') : [];
return labelsId.length ? labelsId.map(labelId => {
const labellingElement = container.querySelector(`[id="${labelId}"]`);
return labellingElement ? {
content: getLabelContent(labellingElement),
formControl: null
} : {
content: '',
formControl: null
};
}) : Array.from(getRealLabels(element)).map(label => {
const textToMatch = getLabelContent(label);
const formControlSelector = 'button, input, meter, output, progress, select, textarea';
const labelledFormControl = Array.from(label.querySelectorAll(formControlSelector)).filter(formControlElement => formControlElement.matches(selector))[0];
return {
content: textToMatch,
formControl: labelledFormControl
};
});
}