angular / angular/components

bug(mat-input): MatInput's autofill styling only covers part of the displayed input

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area: material/input P3
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描述

### Is this a regression?

- [ ] Yes, this behavior used to work in the previous version

### The previous version in which this bug was not present was

_No response_

### Description

When you add an autofill attribute (autofill="name" here) the browser may add some styling as part of its user agent. https://developer.mozilla.org/en-US/docs/Web/CSS/:autofill

This looks very poor on angular material as the autofill color only covers part of the input box; the rest is covered with the configured material color.
![mat16](https://github.com/angular/components/assets/8117238/dac17999-591e-4b57-8174-ed18eeca1651)

### Reproduction

StackBlitz link: https://stackblitz.com/edit/g3qkzv?file=src%2Fexample%2Fform-field-appearance-example.html
Steps to reproduce:
1. Click the 'Fill form field'
2. Select an autocomplete

### Expected Behavior

Autofill styling should cover the whole input box

### Actual Behavior

The chrome defined 'blue area' only covers the internal 'input', the rest of the mat-input gets its gray background styling.

Auto-fill behavior appears work 'correctly' on the mdc-web 'demo' page https://material-components.github.io/material-components-web-catalog/#/component/text-field

(I added the autofill attribute)
![mdc](https://github.com/angular/components/assets/8117238/1ab5e128-b034-4e34-9c3f-746eda922867)

### Environment

- Angular: 16.1.1
- CDK/Material: 16.1.1
- Browser(s): Chrome 113.0.5672.126 (Official Build) (64-bit)
- Operating System (e.g. Windows, macOS, Ubuntu): Ubuntu 22.04.2 LTS

贡献指南

打开贡献指南

调研方向

从链接的 StackBlitz 表单字段示例开始,在 Chrome 中复现自动填充行为。然后检查 MatInput 的样式,并将其与 MDC Web 文本字段演示进行比较;当浏览器的自动填充颜色覆盖整个显示的输入框,而不仅仅是内部 input 时,即表示完成。

由索引模型根据 Issue 内容生成。

评估

技术栈
angular, css, typescript
领域
frontend
Issue 类型
缺陷
难度
3/5
预计耗时
1-2 天
活跃度
停滞
描述清晰度
基本清楚
新手友好度
45/100

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