升级到 Angular Material 17 后出现错误：@include mat.legacy-core() 和 @import "@angular/material/theming"；

Question

升级到 Angular Material 17 后，我的 Angular 应用程序代码库遇到两个不同的问题：

@include mat.legacy-core() 错误： 使用指令 @include mat.legacy-core(); 时，我遇到编译错误。看来这个指令在编译过程中引起了问题，但我不确定如何解决它。

@import“@angular/material/theming”时出错： 此外，我在自定义主题.scss 文件中导入“@angular/material/theming”模块时遇到问题。

这是我的代码：

@use "@angular/material" as mat;
@import "@angular/material/theming";

// Fonts
@import "https://fonts.googleapis.com/css?family=Material+Icons";
@import url("https://fonts.googleapis.com/css?family=Roboto:300,400,500");

@include mat.core();
@include mat.legacy-core();

$fontConfig: (
  display-4: mat-typography-level(112px, 112px, 300, "Roboto", -0.0134em),
  display-3: mat-typography-level(56px, 56px, 400, "Roboto", -0.0089em),
  display-2: mat-typography-level(45px, 48px, 400, "Roboto", 0em),
  display-1: mat-typography-level(34px, 40px, 400, "Roboto", 0.0074em),
  headline: mat-typography-level(24px, 32px, 400, "Roboto", 0em),
  title: mat-typography-level(20px, 32px, 500, "Roboto", 0.0075em),
  subheading-2: mat-typography-level(16px, 28px, 400, "Roboto", 0.0094em),
  subheading-1: mat-typography-level(15px, 24px, 500, "Roboto", 0.0067em),
  body-2: mat-typography-level(14px, 24px, 500, "Roboto", 0.0179em),
  body-1: mat-typography-level(14px, 20px, 400, "Roboto", 0.0179em),
  button: mat-typography-level(14px, 14px, 500, "Roboto", 0.0893em),
  caption: mat-typography-level(12px, 20px, 400, "Roboto", 0.0333em),
  input: mat-typography-level(inherit, 1.125, 400, "Roboto"),
);

// Foreground Elements

// Light Theme Text
$dark-text: #000000;
$dark-primary-text: rgba($dark-text, 0.87);
$dark-accent-text: rgba($dark-primary-text, 0.54);
$dark-disabled-text: rgba($dark-primary-text, 0.38);
$dark-dividers: rgba($dark-primary-text, 0.12);
$dark-focused: rgba($dark-primary-text, 0.12);

$mat-light-theme-foreground: (
  base: black,
  divider: $dark-dividers,
  dividers: $dark-dividers,
  disabled: $dark-disabled-text,
  disabled-button: rgba($dark-text, 0.26),
  disabled-text: $dark-disabled-text,
  elevation: black,
  secondary-text: $dark-accent-text,
  hint-text: $dark-disabled-text,
  accent-text: $dark-accent-text,
  icon: $dark-accent-text,
  icons: $dark-accent-text,
  text: $dark-primary-text,
  slider-min: $dark-primary-text,
  slider-off: rgba($dark-text, 0.26),
  slider-off-active: $dark-disabled-text,
);

// Dark Theme text
$light-text: #ffffff;
$light-primary-text: $light-text;
$light-accent-text: rgba($light-primary-text, 0.7);
$light-disabled-text: rgba($light-primary-text, 0.5);
$light-dividers: rgba($light-primary-text, 0.12);
$light-focused: rgba($light-primary-text, 0.12);

$mat-dark-theme-foreground: (
  base: $light-text,
  divider: $light-dividers,
  dividers: $light-dividers,
  disabled: $light-disabled-text,
  disabled-button: rgba($light-text, 0.3),
  disabled-text: $light-disabled-text,
  elevation: black,
  hint-text: $light-disabled-text,
  secondary-text: $light-accent-text,
  accent-text: $light-accent-text,
  icon: $light-text,
  icons: $light-text,
  text: $light-text,
  slider-min: $light-text,
  slider-off: rgba($light-text, 0.3),
  slider-off-active: rgba($light-text, 0.3),
);

// Background config
// Light bg
$light-background: #fafafa;
$light-bg-darker-01: darken($light-background, 0.1%);
$light-bg-darker-5: darken($light-background, 5%);
$light-bg-darker-10: darken($light-background, 10%);
$light-bg-darker-20: darken($light-background, 20%);
$light-bg-darker-30: darken($light-background, 30%);
$light-bg-lighter-5: lighten($light-background, 5%);
$dark-bg-tooltip: lighten(#2c2c2c, 20%);
$dark-bg-alpha-4: rgba(#2c2c2c, 0.04);
$dark-bg-alpha-12: rgba(#2c2c2c, 0.12);

$mat-light-theme-background: (
  background: $light-background,
  status-bar: $light-bg-darker-20,
  app-bar: $light-bg-darker-5,
  hover: $dark-bg-alpha-4,
  card: $light-bg-lighter-5,
  dialog: $light-bg-lighter-5,
  tooltip: $dark-bg-tooltip,
  disabled-button: $dark-bg-alpha-12,
  raised-button: $light-bg-lighter-5,
  focused-button: $dark-focused,
  selected-button: $light-bg-darker-20,
  selected-disabled-button: $light-bg-darker-30,
  disabled-button-toggle: $light-bg-darker-10,
  unselected-chip: $light-bg-darker-10,
  disabled-list-option: $light-bg-darker-10,
);

// Dark bg
$dark-background: #2c2c2c;
$dark-bg-lighter-3: lighten($dark-background, 3%);
$dark-bg-lighter-5: lighten($dark-background, 5%);
$dark-bg-lighter-10: lighten($dark-background, 10%);
$dark-bg-lighter-20: lighten($dark-background, 20%);
$dark-bg-lighter-30: lighten($dark-background, 30%);
$light-bg-alpha-4: rgba(#fafafa, 0.04);
$light-bg-alpha-12: rgba(#fafafa, 0.12);

// Background palette for dark themes.
$mat-dark-theme-background: (
  background: $dark-background,
  status-bar: $dark-bg-lighter-20,
  app-bar: $dark-bg-lighter-5,
  hover: $light-bg-alpha-4,
  card: $dark-bg-lighter-5,
  dialog: $dark-bg-lighter-5,
  tooltip: $dark-bg-lighter-20,
  disabled-button: $light-bg-alpha-12,
  raised-button: $dark-bg-lighter-5,
  focused-button: $light-focused,
  selected-button: $dark-bg-lighter-20,
  selected-disabled-button: $dark-bg-lighter-30,
  disabled-button-toggle: $dark-bg-lighter-10,
  unselected-chip: $dark-bg-lighter-20,
  disabled-list-option: $dark-bg-lighter-10,
);

// Theme Config

body {
  --primary-color: #0073bd;
  --primary-lighter-color: #b3d5eb;
  --primary-darker-color: #0056a6;
  --text-primary-color: #{$light-primary-text};
  --text-primary-lighter-color: #{$dark-primary-text};
  --text-primary-darker-color: #{$light-primary-text};
}

$mat-primary: (
  main: #0073bd,
  lighter: #b3d5eb,
  darker: #0056a6,
  200: #0073bd,
  contrast: (
    main: $light-primary-text,
    lighter: $dark-primary-text,
    darker: $light-primary-text,
  ),
);
$theme-primary: mat-palette($mat-primary, main, lighter, darker);

body {
  --accent-color: #0073bd;
  --accent-lighter-color: #b3d5eb;
  --accent-darker-color: #0056a6;
  --text-accent-color: #{$light-primary-text};
  --text-accent-lighter-color: #{$dark-primary-text};
  --text-accent-darker-color: #{$light-primary-text};
}

$mat-accent: (
  main: #0073bd,
  lighter: #b3d5eb,
  darker: #0056a6,
  200: #0073bd,
  contrast: (
    main: $light-primary-text,
    lighter: $dark-primary-text,
    darker: $light-primary-text,
  ),
);
$theme-accent: mat-palette($mat-accent, main, lighter, darker);

body {
  --warn-color: #ff0000;
  --warn-lighter-color: #ffb3b3;
  --warn-darker-color: #ff0000;
  --text-warn-color: #{$light-primary-text};
  --text-warn-lighter-color: #{$dark-primary-text};
  --text-warn-darker-color: #{$light-primary-text};
}

$mat-warn: (
  main: #ff0000,
  lighter: #ffb3b3,
  darker: #ff0000,
  200: #ff0000,
  contrast: (
    main: $light-primary-text,
    lighter: $dark-primary-text,
    darker: $light-primary-text,
  ),
);
$theme-warn: mat-palette($mat-warn, main, lighter, darker);

$light-theme: mat-light-theme(
  (
    color: (
      primary: $theme-primary,
      accent: $theme-accent,
    ),
    typography: mat.define-legacy-typography-config(),
    density: 0,
  )
);

$dark-theme: mat-dark-theme(
  (
    color: (
      primary: $theme-primary,
      accent: $theme-accent,
    ),
    typography: mat.define-legacy-typography-config(),
    density: 0,
  )
);

@include mat.all-component-themes($light-theme);

::ng-deep
  .mat-mdc-text-field-wrapper
  .mat-mdc-form-field-flex
  .mat-mdc-floating-label {
  top: 19px !important;
}

.theme-dark {
  background-color: $dark-background !important;
  color: $light-text !important;
  /* .mat-expansion-panel {
    color: white !important;
    background-color: #424242 !important;
  } */

  .mat-mdc-card {
    color: white !important;
    background-color: #424242 !important;
  }
  @include mat.all-component-colors($dark-theme);
}

这些问题阻碍了我的进步，我正在寻求帮助来解决它们。任何关于如何解决这两个错误的见解、建议或指导将不胜感激。谢谢您的帮助！

我尝试使用@import '~@angular/material/theming';。并尝试删除 @include mat.legacy-core();.

当我这样做时，我遇到了其他问题。

Answer 1

@import '@angular/material/theming'

似乎已在 v17 中删除，您一定会遇到此错误 => 无法解析文件“主题”。

您只需删除材质/主题导入即可，您的主题应该可以工作

@use '@angular/material' as mat;

与 @include mat.legacy-core() 存在同样的问题遗留组件的 Angular Material 15 样式。