html - How to display image with JavaScript?

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html - How to display image with JavaScript?

posted Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

html - How to display image with JavaScript?

I am trying to display image, through JavaScript, but i can't figure out how to do that. I have following

function image(a,b,c)
{
  this.link=a;
  this.alt=b;
  this.thumb=c;
}

function show_image()
{
  document.write("img src="+this.link+">");
}

image1=new image("img/img1.jpg","dsfdsfdsfds","thumb/img3");

in HTML

<p><input type="button" value="Vytvor" onclick="show_image()" > </p>

I can't figure out where should I put something like image1.show_image();.

HTML? Or somewhere else...

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1 Reply

深蓝 · Answer 1 · 2021-10-16T22:31:08+0000

You could make use of the Javascript DOM API. In particular, look at the createElement() method.

You could create a re-usable function that will create an image like so...

function show_image(src, width, height, alt) {
    var img = document.createElement("img");
    img.src = src;
    img.width = width;
    img.height = height;
    img.alt = alt;

    // This next line will just add it to the <body> tag
    document.body.appendChild(img);
}

Then you could use it like this...

<button onclick=
    "show_image('http://google.com/images/logo.gif', 
                 276, 
                 110, 
                 'Google Logo');">Add Google Logo</button>

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html - How to display image with JavaScript?

html - How to display image with JavaScript?

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See a working example on jsFiddle: http://jsfiddle.net/Bc6Et/

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