mousedown mouseenter mouseup firefox，还是通一用webkit吧，细节的坑刚刚填，毕竟现在是webkit一家大拿！

mouse,mouseup,mouseenter,mouseover,click坑呀，浏览器表现居然不一致；

firefox呀

直接上代码吧，自定义个el-table的select，chrome表现正常；

firefox就诡异了，mousedown->mouseup,中间不触发mouseover，mouseenter，并且鼠标移出到其它td上up后，居然只能还是在起始td上；并且必然出发click事件；

真是醉了，这个设计也太扯了！

另外扯个firefox开发者工具的鸡肋堆栈跟踪，只显示几个，根本对分析无意义，为什么不显示完整的呢？chrome的堆栈跟踪就很到位，另外html的事件跟踪也完整的。

事实证明呀，还是要走webkit的，firefox再见吧。

 1 const tableSelect: DirectiveOptions = {
 2 
 3 
 4     componentUpdated: (el, binding, vnode) => {
 5             let option = binding.value;
 6             vnode.context?.$nextTick(() => {
 7 
 8                 var rowSelector = `.el-table__body-wrapper table.el-table__body tr.el-table__row`;
 9                 let clearSelected = function (option) {
10                     el.querySelectorAll(`${rowSelector} td`).forEach(function (td) {
11                         td.style.backgroundColor = '';
12                         option.td_selected = [];
13                     });
14                 };
15                 option.td_selected = [];
16                 let td_mousedown;
17                 let td_list = el.querySelectorAll(`${rowSelector} td`);
18                
19                 td_list.forEach(function (td) {
20                     if (!td.querySelector('input')) {
21                         td.onmousedown = (function (ev) {
22                             document.body.onselectstart = () => true;
23                             clearSelected(option);
24                         });
25                         td.onmouseup = (function (ev) {
26                             td_mousedown = undefined;
27                         });
28                         return;
29                     }
30                     td.onmousedown = function(ev){
31                      
32                         if (ev.button != 0) return;
33                         td_mousedown = this;
34                         document.body.onselectstart = () => false;
35                         clearSelected(option);
36                     };
37                     td.onmouseover = (function (ev) {
38                         console.log('onmouseover',this);
39                         if (td_mousedown == undefined) return;
40                         clearSelected(option);
41                         //选区
42                         let range = {
43                             p1: {row: td_mousedown.parentNode.rowIndex, col: td_mousedown.cellIndex},
44                             p2: {row: this.parentNode.rowIndex, col: this.cellIndex},
45                         };
46                         if (range.p1.row > range.p2.row || range.p1.col > range.p2.col) {
47                             range = {p1: range.p2, p2: range.p1};
48                         }
49                         option.td_selected = [];
50                         let rows = el.querySelectorAll(`${rowSelector}`);
51 
52                         for (let i = range.p1.row; i <= range.p2.row; i++) {
53                             let row = rows[i];
54                             let cols = row.querySelectorAll('td');
55                             for (let j = range.p1.col; j <= range.p2.col; j++) {
56                                 let td = cols[j];
57                                 td.style.backgroundColor = '#3390ff';
58                                 option.td_selected.push({td: td, tr: row, row: i, col: j});
59                             }
60                         }
61                     })
62                     td.onmouseup = (function (ev) {
63                         //console.log(this,td_mousedown)
64                         if (ev.button != 0) return;
65                         if (td_mousedown && td_mousedown != this) {
66                             if (option.fn) {
67                                 option.fn(option);
68                             }
69                         }
70                         td_mousedown = undefined;
71                     });
72                 });
73 
74 
75             });
76 
77 
78         }
79     }
80 ;
81 export default tableSelect;