我试图在我的页面中使用 paper-input 元素，但它似乎不起作用。 然后，我尝试在 Polymer 站点上运行演示代码，但这也不起作用，我得到的是简单的文本字段，而不是 Polymer 的纸张输入元素。我使用的代码与示例完全相同，即
<!doctype html>
<html>
<head>
<meta name="viewport" content="width=device-width, minimum-scale=1.0, initial-scale=1, user-scalable=yes">
<title>paper-input</title>
<script src="..components/webcomponentsjs/webcomponents.js"></script>
<link href="..components/paper-input/paper-autogrow-textarea.html" rel="import">
<link href="..components/paper-input/paper-input-decorator.html" rel="import">
<link href="..components/paper-input/paper-input.html" rel="import">
<style shim-shadowdom>
body {
font-family: RobotoDraft, 'Helvetica Neue', Helvetica, Arial;
font-size: 14px;
margin: 0;
padding: 24px;
-webkit-tap-highlight-color: rgba(0,0,0,0);
-webkit-touch-callout: none;
}
section {
padding: 20px 0;
}
section > div {
padding: 14px;
font-size: 16px;
}
paper-input {
width: 80%;
}
paper-input-decorator {
max-width: 80%;
}
@media only screen and (min-width : 320px) {
paper-input {
width: 100%;
}
paper-input-decorator {
max-width: 100%;
}
}
paper-input.narrow {
width: 150px;
}
.custom /deep/ ::-webkit-input-placeholder {
color: #f4b400;
}
.custom /deep/ ::-moz-placeholder {
color: #f4b400;
}
.custom /deep/ :-ms-input-placeholder {
color: #f4b400;
}
.custom /deep/ .label-text,
.custom /deep/ .error {
color: #f4b400;
}
.custom /deep/ .unfocused-underline {
background-color: #f4b400;
}
.custom[focused] /deep/ .floated-label .label-text {
color: #0f9d58;
}
.custom /deep/ .focused-underline {
background-color: #0f9d58;
}
.custom.invalid /deep/ .floated-label .label-text,
.custom /deep/ .error {
color: #f06292;
}
.custom.invalid /deep/ .focused-underline {
background-color: #f06292;
}
.custom {
color: #1a237e;
}
</style>
</head>
<body unresolved>
<section>
<div>Standalone</div>
<br>
<paper-input label="label"></paper-input>
<br>
<paper-input label="floating label" floatingLabel></paper-input>
<br>
<paper-input label="disabled" disabled></paper-input>
</section>
<section>
<div>Decorator</div>
<br>
<paper-input-decorator label="with core-input">
<input is="core-input">
</paper-input-decorator>
<br>
<paper-input-decorator label="with core-input + floatingLabel" floatingLabel>
<input is="core-input">
</paper-input-decorator>
<br>
<paper-input-decorator label="with autogrowing text area">
<paper-autogrow-textarea>
<textarea></textarea>
</paper-autogrow-textarea>
</paper-input-decorator>
<br>
<paper-input-decorator label="with autogrowing text area + floatingLabel" floatingLabel>
<paper-autogrow-textarea>
<textarea></textarea>
</paper-autogrow-textarea>
</paper-input-decorator>
</section>
<section>
<div>Auto-Validation</div>
<paper-input-decorator label="required" floatingLabel error="input is required!" autoValidate>
<input is="core-input" required>
</paper-input-decorator>
</section>
<section>
<div>Custom styling</div>
<br>
<paper-input class="custom" label="paper-input"></paper-input>
<br>
<paper-input-decorator class="custom" label="decorator">
<input is="core-input">
</paper-input-decorator>
</section>
<script>
document.body.addEventListener('change', function(e) {
console.log('change', e.target);
});
</script>
</body>
</html>
最佳答案
在这种情况下，我似乎一直为 CORE-INPUT 收到 404(未找到元素异常)，这似乎有点奇怪。但显然，您需要先导入核心输入，然后才能使用纸张输入，这就是我让它工作的方式。
关于javascript - polymer 纸输入不工作或渲染，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/28185751/