小编Sru*_*thi的帖子

如何验证上传图像的尺寸。上传图像的尺寸应为 100 x 100。

上传.ts

 onFileChange(event) {
     let reader = new FileReader();
     if (event.target.files && event.target.files.length > 0) {
       let file = event.target.files[0];
       reader.readAsDataURL(file);
       reader.onload = () => {
          this.imagePreview = reader.result;
          this.employee.photo = reader.result.split(",")[1];
     };
    }
 }  

上传.html

    <div class="row">
         <div class="col-md-5">
            <input type="file" id="avatar" 
            (change)="onFileChange($event)" #fileInput name="photo">
             <p style="color: red">photo should be 100 x 100 size</p>
          </div>
     </div>