Looking to customize the font size of the placeholder text in an Angular Material form field? You can set two different font sizes: one for when the placeholder is normal and one for when it floats. Here's how you can achieve this:
<mat-form-field class="form-group example-full-width">
<input matInput id="Fname" placeholder="First" class=" " formControlName="FirstName">
<mat-error *ngIf="firstName.invalid" class="">First name is required</mat-error>
</mat-form-field>
Using a floating text as a label allows for easy css targeting. Here's a potential solution:
.custom-label {
font-size: 18px;
}
Adjusting the label when it floats:
.custom-label.float {
font-size: 12px;
}
The solution provided earlier is no longer effective. Here is the updated approach I used:
.mat-form-field-can-float.mat-form-field-should-float .mat-form-field-label,
.mat-form-field-can-float .mat-input-server:focus + .mat-form-field-label-wrapper .mat-form-field-label {
transform: translateY(-1.34375em) scale(1) !important; /* originally scale(0.75) */
}
This method has been successful for me, you might want to give it a try:
HTML
<div>
<mat-form-field>
<mat-label>Email Address</mat-label>
<input matInput placeholder="Ex. <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="1c79647d716c70795c79647d716c7079327f7371">[email protected]</a>">
</mat-form-field>
</div>
SCSS
.mat-form-field{
font-size: 17px;
width: 280px;
&.mat-focused{
font-size: 20px;
}
.mat-input-element{
width: 100%;
font-size: 14px;
}
&::placeholder{
font-size: 14px;
}
}
.mat-form-field-should-float {
font-size: 20px;
}
Check out the Form Field section in the official Angular Material documentation (since version 5) for a recommendation on adjusting the font size. Here's what they suggest:
The font size of mat-form-field is inherited from its parent element. You can override this by using CSS to set an explicit size. It is recommended to have at least 1 element + 1 class specificity.
mat-form-field.mat-form-field {
font-size: 16px;
}
You can also adjust the font size of the label in the form field:
mat-label.mat-label {
font-size: 16px;
}
Alternatively, if you prefer keeping your styles neat and organized, you can create a simple CSS class to apply new font properties:
.html
`<mat-form-field class="new-form-theming">..`.
.css
.new-form-theming {
font-size: 24px;
line-height: 28px;
font-weight: 500;
}
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