为角材料设置输入 mat-form-fields 的宽度

Question

I am so very new to Angular, and I am trying to create a form with longer-than-default input fields. This is my current code:

person.component.html

<form class="new-person-form">
    <mat-card>
        <mat-form-field>
            <input matInput placeholder="Name">
        </mat-form-field>
        <mat-form-field>
            <input matInput placeholder="Birthday">
        </mat-form-field>
        <mat-checkbox>Active</mat-checkbox>
    </mat-card>
</form>

person.component.css

.mat-form-field {
    padding: 10px;
}

.mat-checkbox {
    padding: 10px;
}

person.component.html

<form class="new-person-form">
    <mat-card fxLayout="row">
        <mat-form-field>
            <input matInput placeholder="Name" fxFlex="50">
        </mat-form-field>
        <mat-form-field>
            <input matInput placeholder="Birthday" fxFlex="25">
        </mat-form-field>
        <mat-checkbox fxFlex="25">Active</mat-checkbox>
    </mat-card>
</form>

person.component.css

.mat-form-field {
    padding: 10px;
}

.mat-checkbox {
    padding: 10px;
}

And this is the result:

|                                                                          |
|   Name___________  Birthday_______  [] Active                            |
|                                                                          |

I'm trying to lengthen Name to be about 50% of the page, so something like this:

|                                                                          |
|   Name___________________________  Birthday_______  [] Active            |
|                                                                          |

I'm not super great at CSS, so I think FlexLayout might be what I need, but so far I can't get it to work correctly.

Answer 1

This will change the width of matform field

<mat-form-field [style.width.px]=327>
  <input matInput placeholder="Template Name" value="{{templateName}}">
</mat-form-field>

Answer 2

The following will make the field 50% of the Viewport Width by using style="width:50vw"

<mat-form-field style="width:50vw" ...>
   ...
</mat-form-field>

Answer 3

Using fxLayout you can create a flexbox. For making each element in flexbox to consume full row you should use fxFlexFill. For making an element consuming the remaining space you can use fxFlex.

You can also use fxLayoutGap instead of padding in styles. Also if you want the elements to go to the next line when there is no more space you can use fxLayout="row wrap".

Here are some samples of what you were looking for:

    <form class="new-person-form">
        <h3>full Rows:</h3>
        <mat-card fxLayout="row wrap">
            <mat-form-field fxFlexFill>
                <input matInput placeholder="Name" fxFlex="50">
        </mat-form-field>
        <mat-form-field fxFlexFill>
            <input matInput placeholder="Birthday" fxFlex="25">
        </mat-form-field>
        <mat-checkbox fxFlex="25">Active</mat-checkbox>
      </mat-card>
      <h3>50-25-25:(checkbox consumes same space as Birthday)</h3>
      <mat-card fxLayout="row" fxLayoutAlign="start center" fxLayoutGap="15px">
          <mat-form-field fxFlex="50">
              <input matInput placeholder="Name">
          </mat-form-field>
          <mat-form-field fxFlex="25">
              <input matInput placeholder="Birthday">
          </mat-form-field>
          <mat-checkbox fxFlex="25">Active</mat-checkbox>
      </mat-card>
      <h3>50-remaining-required:(Birthday consumes remaining space)</h3>
      <mat-card fxLayout="row" fxLayoutAlign="start center" fxLayoutGap="15px">
          <mat-form-field fxFlex="50">
              <input matInput placeholder="Name">
          </mat-form-field>
          <mat-form-field fxFlex>
              <input matInput placeholder="Birthday">
          </mat-form-field>
          <mat-checkbox>Active</mat-checkbox>
      </mat-card>
    </form>

I've also created aworking example in stack blitz .

Answer 4

you can use that css tricks

.mat-form-field{
   width:350px !important;
}

Answer 5

Forcing the styles should do the trick as

.mat-input-wrapper{
  width:400px !important;
}

OR

<mat-form-field style="width:400px !important" ...>
   ...
</mat-form-field>

Try adding a class if you want to handle not all the input fields on the page.

Answer 6

Some of the other answers have already sort of suggested this, but the key for me was to set the width on the mat-form-field instead of on the input element. When I tried to set the input element's width property (or use CSS width on the input element) it had no effect at all.

Answer 7

Add a class mat-form-field in order to decrease width of mat-input

<mat-form-field class="reduce-width">
   <mat-label>Label</mat-label>
     <input required matInput type="text"[formControl]="controlName">
</mat-form-field>

.reduce-width {
  width: 256px;
  margin-left: 17px;
}

Answer 8

You can use the material documentation to his, just put the col size. Read this to undestand: https://material.io/design/layout/responsive-layout-grid.html#columns-gutters-margins