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Brightnes

his method asynchronously changes the brightness of the specified image element by applying a brightness adjustment factor.

Syntax​

changeBrightness(image, factor)

Parameters​

  • image : HTMLImageElement
    The image element to change the brightness of.

  • factor : number
    The brightness adjustment factor (-100 to 100):

    • factor > 0: the image luminance gets increased by the factor.
    • factor < 0: the image luminance gets decreased by the factor.
    • factor = 0: the image does not change.

Return​

  • Promise : Promise<HTMLImageElement>
    A promise that resolves with the image element with adjusted brightness.

Throws​

  • Error
    Thrown if the specified brightness factor is outside the valid range.

Examples​

const editpix = new EditPix();

// image url
const url = "images/img.jpg";

// crate image
var image = new Image();
image.src = url;

//waiting image load
image.onload = () => {
    //change brightness of image
    editpix.changeBrightness(image, -90)
        .then(resultImage => {
            // render modified image
            document.body.appendChild(resultImage);
        })
        .catch(error => { console.log(error) })
}