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Angular 2&4 noProviderError – 扎老铁
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Warning: mysqli_num_fields() expects parameter 1 to be mysqli_result, boolean given in /www/wwwroot/dev.zhalaotie.com/wp-includes/wp-db.php on line 3215
class="post-52856 post type-post status-publish format-standard hentry">

Angular 2&4 noProviderError

Angular 4 报这个错,通常是 Component 的 constructor 里依赖的类,没有再 NgModule 的 providers 中配置好依赖

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