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<input type="checkbox" [required]="(currentState == null) ? (true) : (false)">
<amp-state id="privacySettings">
<script type="application/json">{
"general": {
"mp": "required",
"p1": false,
"p5": false
},
"specific": {
"mp": false,
"p1": "required",
"p5": "required",
"ck": false
}
}
</script>
</amp-state>
<div class="privacy">
<div id="pmaindiv">
<input on="tap:err_mess.hide" role="mainmandatoryprivacy" tabindex="1" type="checkbox" name="main-privacy" id="pmain" class="pmain" value="1" [required]=privacySettings[currentState].mp [checked]=privacySettings[currentState].ck >
<amp-state id="temp">
<script type="application/json">
{
"var": "general"
}
</script>
</amp-state>
(...) [required]="(currentState==null) ? privacySettings[temp.var].mp : privacySettings[currentState].mp" (...)
最佳答案
您是否正在设置 required
属性以及 [required]
捆绑?
试试这个:
<input type="checkbox"
[required]="(currentState == null ? 'true' : 'false')"
required="true">
(myVar || 'defaultVal')
myVar
未定义,则值为
defaultVal
将被使用。
<amp-state>
像这样:
<amp-state id="props">
<script type="application/json">
{
"myVar": "blah"
}
</script>
</amp-state>
id
前面加上前缀来使用该变量。你给了
amp-state
像这样的元素:
props.myVar
currentState
在最初的
amp-state
元素
required
属性
<amp-state id="privacySettings">
<script type="application/json">
{
"currentState":"general",
"general": {
"mp": "required",
"p1": false,
"p5": false
},
"specific": {
"mp": false,
"p1": "required",
"p5": "required",
"ck": false
}
}
</script>
</amp-state>
<div class="privacy">
<div id="pmaindiv">
<input role="mainmandatoryprivacy" tabindex="1" type="checkbox" name="main-privacy" id="pmain" class="pmain" value="1"
required="required"
[required]=privacySettings[privacySettings.currentState].mp
>
</div>
</div>
<amp-state id="privacySettings">
<script type="application/json">
{
"general": {
"mp": "required",
"p1": false,
"p5": false
},
"specific": {
"mp": false,
"p1": "required",
"p5": "required",
"ck": false
}
}
</script>
</amp-state>
<amp-state id="temp">
<script type="application/json">
{
"var": "general"
}
</script>
</amp-state>
<div class="privacy">
<div id="pmaindiv">
<input role="mainmandatoryprivacy" tabindex="1" type="checkbox" name="main-privacy" id="pmain" class="pmain" value="1"
required="required"
[required]=(currentState==null?privacySettings[temp.var].mp:currentState)
>
</div>
</div>
关于amp-html - 如何为 AMP 未初始化的变量设置默认值?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/44722236/
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