如何为界面的元素添加事件处理？

比眉伴天荒 2022-01-14 21:11 228阅读 0赞

[2019独角兽企业重金招聘Python工程师标准>>> ][2019_Python_] ![hot3.png][]

**1、 添加脚本加载的状态事件。**

_scriptOnload = doc.createElement('script').readyState ?
                function(node, callback) {
                    var oldCallback = node.onreadystatechange;
                    node.onreadystatechange = function() {
                        var rs = node.readyState;
                        if (rs === 'loaded' || rs === 'complete') {
                            node.onreadystatechange = null;
                            oldCallback && oldCallback();
                            callback.call(this);
                        }
                    };
                } :
                function(node, callback) {
                    node.addEventListener('load', callback, false);
                };

2、 **为界面添加 加载脚本的Js,**

head = doc.getElementsByTagName('head')[0] || doc.documentElement,
            _getScript = function(url, fn) {
                var node = doc.createElement('script');
                node.src = url;
                node.async = true;
                _scriptOnload(node, function() {
                    fn && fn.call(node, '');
                    if (head && node.parentNode) {
                        head.removeChild(node);
                    }
                });
                head.insertBefore(node, head.firstChild);
                return node;
            }

转载于:https://my.oschina.net/frankies/blog/304030

[2019_Python_]: https://my.oschina.net/u/2663968/blog/3061697
[hot3.png]: /images/20220114/dfbf364a99644289a65b8e8616e09f74.png