今天来教大家如何使用 ale.js 制作一个小而美的表格编辑器，首先先上 gif：
是不是还是有一点非常 cool 的感觉的？那么我们现在开始吧！
这是我们这篇文章结束后完成的效果（如果想继续完成请访问第五篇文章）：
ok，那继续开始吧（本篇文章是表格编辑器系列的第四篇文章，如果您还没有看过第一篇，请访问 第一篇文章（开源中国））：
首先我们需要先添加一个 Sreach 按钮（在 handleTemplateRender 函数里）：
//把 定义DOM基本结构 的 returnVal
var returnVal = "<table><thead><tr>"
//改为
var returnVal = "<table><thead><button class='a-btn' onclick='this.methods.trigSearch()'>Search</button><tr>"之后我们需要在 methods 里面添加一个 trigSearch 函数：
trigSearch(){
if (this.data.isOpenSearch) {
this.data.data = this.staticData.preData;
this.data.isOpenSearch = false;
} else {
this.data.isOpenSearch = true;
}
}接下来，我们需要在 data 里添加一个 isOpenSearch 变量，默认为 false：
isOpenSearch: false还要在 staticData 里添加一个 preData，用来存储 bookData 数据：
preData: [
["The Lord of the Rings", " J. R. R. Tolkien", "English", "1954-1955", "150 million"],
["The Little Prince", "Antoine de Saint-Exupéry", "French", "1943", "140 million"],
["Dream of the Red Chamber", "Cao Xueqin", "Chinese", "1791", "100 million"]
]之后我们要在 handleTemplateRender 函数中增加一个判断，判断是否 openSearch 开启了：
//把
//循环遍历bookHeader数据并输出
this.data.bookHeader.forEach(function(val, i, arr) {
returnVal += "<th onclick='this.methods.handleTheadOnclick(event)'>" + val + (sortBy === i ? getSortSign() : '') + "</th>";
})
returnVal += "</thead></tr><tbody>";
//改为
//循环遍历bookHeader数据并输出
this.data.bookHeader.forEach(function(val, i, arr) {
returnVal += "<th onclick='this.methods.handleTheadOnclick(event)'>" + val + (sortBy === i ? getSortSign() : '') + "</th>";
})
var cellId = -1;
if (this.data.isOpenSearch) { //这里增加判断
returnVal += "</tr><tr>";
for (var i = 0; i < this.data.bookHeader.length; i++) {
cellId++;
returnVal += "<th><input data-cell='" + cellId + "' type='text' oninput='this.methods.handleSearch(this, event)' placeHolder='Search...'></th>";
}
}
returnVal += "</thead></tr><tbody>";然后我们要继续在 methods 里面添加一个名叫 handleSearch 的函数：
handleSearch(el, e) {
var newData = [],
elVal = el.value;
this.staticData.preData.forEach(function(val, i, arr) {
//判断是否拥有输入的字段
if (val[e.target.dataset.cell].indexOf(elVal) !== -1) {
//添加到返回对列中
newData.push(val);
}
});
this.data.bookData = newData;
}现在我们就已经实现了搜索功能，恭喜！
这是我们目前全部的 js 代码：
Ale("excel", {
template() {
return this.methods.handleTemplateRender();
},
methods: {
handleTemplateRender() {
//定义DOM基本结构
var returnVal = "<table><thead><button class='a-btn' onclick='this.methods.trigSearch()'>Search</button><tr>",
getSortSign = this.methods.getSortSign,
sortBy = this.staticData.sortBy,
rowId = -1,
edit = this.data.edit;
//循环遍历bookHeader数据并输出
this.data.bookHeader.forEach(function(val, i, arr) {
returnVal += "<th onclick='this.methods.handleTheadOnclick(event)'>" + val + (sortBy === i ? getSortSign() : '') + "</th>";
})
var cellId = -1;
if (this.data.isOpenSearch) {
returnVal += "</tr><tr>";
for (var i = 0; i < this.data.bookHeader.length; i++) {
cellId++;
returnVal += "<th><input data-cell='" + cellId + "' type='text' oninput='this.methods.handleSearch(this, event)' placeHolder='Search...'></th>";
}
}
returnVal += "</thead></tr><tbody>";
//循环遍历bookData数据并输出
this.data.bookData.forEach(function(thisBook, i, arr) {
var cellId = -1;
rowId++;
//输出一行
returnVal += "<tr>";
thisBook.forEach(function(val, i, arr) {
cellId++;
if (rowId === edit.row && cellId === edit.cell) {
returnVal += "<td><form data-cell='" + cellId + "' data-row='" + rowId + "' onsubmit='this.methods.save(event)'><input type='text' value='" + val + "'></form></td>";
} else {
returnVal += "<td data-cell='" + cellId + "' data-row='" + rowId + "' ondblclick='this.methods.handleBlockOndblclick(event)'>" + val + "</td>";
}
})
returnVal += "</tr>";
})
returnVal += "</tbody></table>";
//返回DOM结构
return returnVal;
},
handleTheadOnclick(e) {
this.methods.changeSortType(e);
this.methods.sortList(e);
},
changeSortType(e) {
this.staticData.sortBy = e.target.cellIndex;
if (this.staticData.sortType === "up") {
this.staticData.sortType = "down";
} else {
this.staticData.sortType = "up";
}
},
sortList(e) {
var index = e.target.cellIndex;
if (this.staticData.sortType === "up") {
this.data.bookData.sort(function(a, b) {
return a[index].charCodeAt(0) > b[index].charCodeAt(0) ? 1 : -1;
})
} else {
this.data.bookData.sort(function(a, b) {
return a[index].charCodeAt(0) < b[index].charCodeAt(0) ? 1 : -1;
})
}
this.data.bookData = this.data.bookData;
},
getSortSign() {
if (this.staticData.sortType === "up") {
return '\u2191';
} else {
return '\u2193';
}
},
handleBlockOndblclick(e) {
if (!this.staticData.isOpenEdit) {
this.staticData.isOpenEdit = true;
this.data.edit = {
row: parseInt(e.target.dataset.row),
cell: parseInt(e.target.dataset.cell)
}
}
},
save(e) {
e.preventDefault();
var input = e.target.firstChild;
this.staticData.isOpenEdit = false;
this.data.edit = {
row: -1,
cell: -1
}
this.data.bookData[e.target.dataset.row][e.target.dataset.cell] = input.value;
this.data.bookData = this.data.bookData;
},
trigSearch() {
if (this.data.isOpenSearch) {
this.data.bookData = this.staticData.preData;
this.data.isOpenSearch = false;
} else {
this.data.isOpenSearch = true;
}
},
handleSearch(el, e) {
var newData = [],
elVal = el.value;
this.staticData.preData.forEach(function(val, i, arr) {
if (val[e.target.dataset.cell].indexOf(elVal) !== -1) {
newData.push(val);
}
});
this.data.bookData = newData;
}
},
data: {
bookHeader: [
"Book", "Author", "Language", "Published", "Sales"
],
bookData: [
["The Lord of the Rings", " J. R. R. Tolkien", "English", "1954-1955", "150 million"],
["The Little Prince", "Antoine de Saint-Exupéry", "French", "1943", "140 million"],
["Dream of the Red Chamber", "Cao Xueqin", "Chinese", "1791", "100 million"]
],
edit: {
row: -1,
cell: -1
},
isOpenSearch: false
},
staticData: {
sortBy: -1,
sortType: 'down',
isOpenEdit: false,
preData: [
["The Lord of the Rings", " J. R. R. Tolkien", "English", "1954-1955", "150 million"],
["The Little Prince", "Antoine de Saint-Exupéry", "French", "1943", "140 million"],
["Dream of the Red Chamber", "Cao Xueqin", "Chinese", "1791", "100 million"]
]
}
})
Ale.render("excel", {
el: "#app"
})如果想了解更多，欢迎关注我在明天推出的第五篇教程，同时也关注一下 alejs 哦，感谢各位！
（非常重要：如果有能力的话不妨去 Github 或 码云 上 star 一下我们吧！不过如果您特别喜欢 alejs 的话也可以 watch 或 fork 一下哦！十分感谢！）
