xl-infinite-tree/lib/dom.js

A browser-ready tree library that can efficiently display a large amount of data using infinite scrolling.

'use strict';

exports.__esModule = true;
var getElementStyle = function getElementStyle(el, prop) {
    return window.getComputedStyle ? window.getComputedStyle(el)[prop] : el.currentStyle[prop];
};

var preventDefault = function preventDefault(e) {
    if (typeof e.preventDefault !== 'undefined') {
        e.preventDefault();
    } else {
        e.returnValue = false;
    }
};

var stopPropagation = function stopPropagation(e) {
    if (typeof e.stopPropagation !== 'undefined') {
        e.stopPropagation();
    } else {
        e.cancelBubble = true;
    }
};

// https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener#Compatibility
var addEventListener = function addEventListener(target, type, listener) {
    if (target.addEventListener) {
        // Standard
        target.addEventListener(type, listener, false);
    } else if (target.attachEvent) {
        // IE8
        // In Internet Explorer versions before IE 9, you have to use attachEvent rather than the standard addEventListener.
        target.attachEvent('on' + type, listener);
    }
};

// https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/removeEventListener
var removeEventListener = function removeEventListener(target, type, listener) {
    if (target.removeEventListener) {
        // Standard
        target.removeEventListener(type, listener, false);
    } else if (target.detachEvent) {
        // IE8
        // In Internet Explorer versions before IE 9, you have to use detachEvent rather than the standard removeEventListener.
        target.detachEvent('on' + type, listener);
    }
};

exports.getElementStyle = getElementStyle;
exports.preventDefault = preventDefault;
exports.stopPropagation = stopPropagation;
exports.addEventListener = addEventListener;
exports.removeEventListener = removeEventListener;