我有一个代码:
document.getElementById('loginInput').value = '123';
但在编译代码时我收到以下错误:
HTMLElement类型中不存在属性值.
我宣布了一个var : value: string;.
我怎样才能避免这个错误？
谢谢.
我必须在 owl carousel 中使用 parallax.js 作为背景图像。例如，我想将http://pixelcog.github.io/parallax.js/与https://owlcarousel2.github.io/OwlCarousel2/docs/started-welcome.html一起使用， 我该怎么做？笔：https : //codepen.io/naaatasha/pen/gRdoej
<div class="owl-carousel slider">
<div class="item slide-wrapper parallax-window" data-parallax="scroll" data-image-src="http://trawnik.nazwa.pl/TrawnikProducent2016/wp-content/uploads/slide-strong-1.jpg">
<div class="container">
<div class="box">
<h2 class="h2 wow fadeIn text-right">co tam</h2>
<span class="subtitle wow fadeIn">ihsisdijbvjd</span>
</div>
</div>
</div>
<div class="item slide-wrapper parallax-window" data-parallax="scroll" data-image-src="http://www.focus.pl/upload/galleries/19/trawa-19061_l.jpg">
<div class="container">
<div class="box">
<h2 class="h2">lorem ipsum</h2>
<span class="subtitle">asdsk jbsjfd</span>
</div>
</div>
</div>
</div>
.slider {
position: relative;
display: table;
}
.box {
display: table-cell;
vertical-align: middle;
width: 1%;
}
.slide-wrapper {
height: 800px; …我正在为我的项目编写测试用例。但不幸的是，在通过键入开始测试之后ng test，我收到以下错误：
Error: Error in :0:0 caused by: Plotly is
ReferenceError: Plotly is not defined
Plotly是一个外部图表库。我试图在test文件中声明它：
import { async, ComponentFixture, TestBed } from '@angular/core/testing';
import { By } from '@angular/platform-browser';
import { DebugElement } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { MaterialModule } from '@angular/material';
import { WatchlistComponent } from './watchlist.component';
declare let Plotly: any;
describe('SystemComponent', () => {
let component: WatchlistComponent;
let fixture: ComponentFixture<WatchlistComponent>;
let element;
beforeEach(async(() => {
TestBed.configureTestingModule({
declarations: …我想在选择选项中使用@click。
到目前为止，我有：
<button @click="sortBy('name')">sort by name</button>
<button @click="sortBy('price')">sort by price</button>
并且可以正常工作，但是当我将其插入选项标签时，它停止工作了。
<select name="sortBy" id="sortBy">
<option value="sort">sort By</option>
<option @click="sortBy('name')">name</option>
<option @click="sortBy('price')">price</option>
</select>
我的功能：
sortBy(sortKey) {
this.items.sort((a, b) =>
(typeof a[sortKey] === 'string' || typeof b[sortKey] === 'string') ?
a[sortKey].localeCompare(b[sortKey]) : a[sortKey] - b[sortKey]);
}