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Contents
/* global table, dom */
/**
* Determine if a `HTMLTableCellElement` is a column header, if so get the scope of the header
* @method getScope
* @memberof axe.commons.table
* @instance
* @param {HTMLTableCellElement} cell The table cell to test
* @return {Boolean|String} Returns `false` if not a column header, or the scope of the column header element
*/
table.getScope = function(cell) {
var scope = cell.getAttribute('scope');
var role = cell.getAttribute('role');
if (
cell instanceof Element === false ||
['TD', 'TH'].indexOf(cell.nodeName.toUpperCase()) === -1
) {
throw new TypeError('Expected TD or TH element');
}
if (role === 'columnheader') {
return 'col';
} else if (role === 'rowheader') {
return 'row';
} else if (scope === 'col' || scope === 'row') {
return scope;
} else if (cell.nodeName.toUpperCase() !== 'TH') {
return false;
}
var tableGrid = table.toGrid(dom.findUp(cell, 'table'));
var pos = table.getCellPosition(cell, tableGrid);
// The element is in a row with all th elements, that makes it a column header
var headerRow = tableGrid[pos.y].reduce((headerRow, cell) => {
return headerRow && cell.nodeName.toUpperCase() === 'TH';
}, true);
if (headerRow) {
return 'col';
}
// The element is in a column with all th elements, that makes it a row header
var headerCol = tableGrid
.map(col => col[pos.x])
.reduce((headerCol, cell) => {
return headerCol && cell && cell.nodeName.toUpperCase() === 'TH';
}, true);
if (headerCol) {
return 'row';
}
return 'auto';
};
Version data entries
271 entries across 271 versions & 1 rubygems