Zhentiw - 博客园

2016年10月28日

[Angular2 Form] Model Driven Form Custom Validator

摘要： In this tutorial we are going to learn how simple it is to create custom form field driven validators while using Angular 2 model driven forms. These 阅读全文

posted @ 2016-10-28 18:13 Zhentiw 阅读(276) 评论(0) 推荐(0)

[Angular2 Animation] Use Keyframes for Fine-Tuned Angular 2 Animations

摘要： When easing isn’t enough to get the exact animation you want, you can leverage keyframes to define and precise styles and steps over time. Keyframes a 阅读全文

posted @ 2016-10-28 17:39 Zhentiw 阅读(190) 评论(0) 推荐(0)

[Angular2 Animation] Delay and Ease Angular 2 Animations

摘要： By default, transitions will appear linearly over time, but proper animations have a bit more customization to them by delaying when they start and co 阅读全文

posted @ 2016-10-28 17:38 Zhentiw 阅读(265) 评论(0) 推荐(0)

[Angular2 Animation] Control Undefined Angular 2 States with void State

摘要： Each trigger starts with an “undefined” state or a “void” state which doesn’t match any of your currently defined states. You have to be aware of when 阅读全文

posted @ 2016-10-28 17:37 Zhentiw 阅读(369) 评论(0) 推荐(0)

2016年10月27日

[CSS] Use Generated Content to Augment Information

摘要： When you create a pseudo element, you have access to the parent HTML attributes. They can be used inside the content attribute of a pseudo element. 阅读全文

posted @ 2016-10-27 19:09 Zhentiw 阅读(143) 评论(0) 推荐(0)

[Angular2 Form] Reactive Form, show error message for one field

摘要： In this tutorial we are going to learn how we mark form fields in error and display error messages to the user in the case of Angular 2 model driven f 阅读全文

posted @ 2016-10-27 01:09 Zhentiw 阅读(320) 评论(0) 推荐(0)

2016年10月26日

[CSS] Control Image Aspect Ratio Using CSS (object-fit)

摘要： Resize images and videos to fill their parent and maintain their aspect ratio with pure CSS. The new object-fit and object-position properties allow y 阅读全文

posted @ 2016-10-26 22:36 Zhentiw 阅读(212) 评论(0) 推荐(0)

[Angular2 Form] Reactive form: valueChanges, update data model only when form is valid

摘要： For each formBuild, formControl, formGroup they all have 'valueChanges' prop, which is an Observable. If you want to only update form data model when 阅读全文

posted @ 2016-10-26 19:59 Zhentiw 阅读(763) 评论(0) 推荐(0)

[RxJS] Conclusion: when to use Subjects

摘要： As a conclusion to this course about RxJS subjects, let's review when and why should you use them. For certain cases, subjects are absolutely necessar 阅读全文

posted @ 2016-10-26 18:52 Zhentiw 阅读(254) 评论(0) 推荐(0)

[RxJS] Multicast with a selector argument, as a sandbox

摘要： Let's explore a different use of the multicast() operator in RxJS, where you can provide a selector function as a sandbox where the shared Observable 阅读全文

posted @ 2016-10-26 18:44 Zhentiw 阅读(484) 评论(0) 推荐(0)

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