019: vue中使用fetch读取本地txt文件

桃扇骨 2024-03-16 20:34 87阅读 0赞

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第019个

查看专栏目录: [VUE][] — [element UI][]

在做卫星项目的时候，会将两行根数放在txt文件中，放在public的文件夹中， 如何读取呢？ 可以用以下方法：

### 方法1 ###

loadFile(name) \{  
const xhr = new XMLHttpRequest()  
const okStatus = document.location.protocol === ‘file:’ ? 0 : 200  
xhr.open(‘GET’, name, false)  
xhr.overrideMimeType(‘text/html;charset=utf-8’)// 默认为utf-8  
xhr.send(null)  
return xhr.status === okStatus ? xhr.responseText : null  
\},  
mydate()\{  
let file=this.loadFile(“data/tle/ext/move.txt”);  
console.log(file)  
\},

### 方法2 ###

addFromTleUrl(url, tags) \{  
// debugger  
fetch(url, \{  
mode: “no-cors”,  
\})  
.then(response => \{  
if (!response.ok) \{  
throw Error(response.statusText);  
\}  
return response;  
\}).then(response => response.text())  
.then(data => \{  
const lines = data.split(/ ? /);  
for (let i = 3; i < lines.length; i + 3) \{  
let tle = lines.splice(i - 3, i).join(" ");  
console.log(tle);  
// this.addFromTle(tle, tags);  
\}  
\}).catch(function(error) \{  
console.log(error);  
\});  
\}

mydate()\{  
this.addFromTleUrl(“data/tle/ext/move.txt”);  
\},

### 专栏目标 ###

在vue和element UI联合技术栈的操控下，本专栏提供行之有效的源代码示例和信息点介绍，做到灵活运用。

（1）提供vue2的一些基本操作：安装、引用，模板使用，computed，watch，生命周期(beforeCreate，created,beforeMount，mounted, beforeUpdate，updated, beforeDestroy，destroyed，activated，deactivated，errorCaptured，components，)、 $root , $parent , $children , $slots , $refs , props, $emit , eventbus ,provide / inject, Vue.observable, $listeners, $attrs, $nextTick , v-for, v-if, v-else,v-else-if，v-on，v-pre，v-cloak，v-once，v-model， v-html, v-text, keep-alive，slot-scope， filters, v-bind，.stop, .native, directives，mixin，render，国际化，Vue Router等

（2）提供element UI的经典操作：安装，引用，国际化，el-row，el-col，el-button，el-link，el-radio，el-checkbox ，el-input，el-select, el-cascader, el-input-number, el-switch,el-slider, el-time-picker, el-date-picker, el-upload, el-rate, el-color-picker, el-transfer, el-form, el-table, el-tree, el-pagination,el-badge,el-avatar,el-skeleton, el-empty, el-descriptions, el-result, el-statistic, el-alert, v-loading, $message, $alert, $prompt, $confirm , $notify, el-breadcrumb, el-page-header,el-tabs ,el-dropdown,el-steps,el-dialog, el-tooltip, el-popover, el-popconfirm, el-card, el-carousel, el-collapse, el-timeline, el-divider, el-calendar, el-image, el-backtop，v-infinite-scroll， el-drawer等

[32d2a1d099334cfba6adc4f84dd79e22.png_pic_center]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/15/3e483db65dbe4d0da06ebb3ef2be1689.png
[VUE]: https://blog.csdn.net/cuclife/article/details/131138955
[element UI]: https://blog.csdn.net/cuclife/article/details/131140113