使用javascript的图像缩小功能

我正在做一个项目，其中有一个图像时，用户点击图像放大和再次点击图像缩小。如何在代码中创建缩小功能

---

这里不需要很多javascript。只需要一些好的CSS，如下所示：

JS:

css:

---

试试看下面的代码是否对您有帮助

编辑：以防您希望在同一页面中的多个图像上执行此操作

var zoom = "in";

$('.image').on('click', function () {
    this.zoom = (this.zoom == "in") ? "out" : "in";
    console.log(this.zoom);
    resizeImg(this);
});

function resizeImg (img) {
    var scale = 150/100;
    var pos = $(img).offset();
    var clickX = event.pageX - pos.left;
    var clickY = event.pageY - pos.top;
    var container = $(img).parent().get(0);

    if(img.zoom == "in"){
         $(img).css({
            width: img.width*scale, 
            height: img.height*scale
         });
    }
    else if (img.zoom == "out"){
        $(img).css({
            width: img.width/scale, 
            height: img.height/scale
        });
    }  
    container.scrollLeft = ($(container).width() / -2 ) + clickX * scale;
    container.scrollTop = ($(container).height() / -2 ) + clickY * scale;
}

为所有图像设置

zoom

attribute=0-->

$（'img'）.attr（'zoom'，0）

如果
zoom
属性设置为
0
我们将使
zoom
生效并设置属性
zoom=1

否则
zoom
属性设置为已缩放的
1
，我们设置属性
zoom=0
，并删除
style
属性以使图像恢复正常。
如果您有多个图像，这也可能对您有所帮助

JSfiddle：

JS代码：

$('.image').on('click', function () {
    if (typeof this.toggleZoom === "undefined") this.toggleZoom = false;
    this.toggleZoom = !this.toggleZoom;
    resizeImg(this);
});

function resizeImg(img) {
    var scale = (img.toggleZoom) ? 150 / 100 : 100 / 150;
    console.log(scale);
    var pos = $(img).offset();
    var clickX = event.pageX - pos.left;
    var clickY = event.pageY - pos.top;
    var container = $(img).parent().get(0);

    $(img).css({
        width: img.width * scale,
        height: img.height * scale
    });

    container.scrollLeft = ($(container).width() / -2) + clickX * scale;
    container.scrollTop = ($(container).height() / -2) + clickY * scale;
}

我补充的
及

你是说第一次点击应该放大，下一次应该缩小？是的，这正是我想要的。
#Container {
    position:relative;
    overflow:auto;
}

.zoom{
    -webkit-transform : scale(1.5);
    transform: scale(1.5);
}

var zoom = "in";

$('.image').on('click', function () {
    this.zoom = (this.zoom == "in") ? "out" : "in";
    console.log(this.zoom);
    resizeImg(this);
});

function resizeImg (img) {
    var scale = 150/100;
    var pos = $(img).offset();
    var clickX = event.pageX - pos.left;
    var clickY = event.pageY - pos.top;
    var container = $(img).parent().get(0);

    if(img.zoom == "in"){
         $(img).css({
            width: img.width*scale, 
            height: img.height*scale
         });
    }
    else if (img.zoom == "out"){
        $(img).css({
            width: img.width/scale, 
            height: img.height/scale
        });
    }  
    container.scrollLeft = ($(container).width() / -2 ) + clickX * scale;
    container.scrollTop = ($(container).height() / -2 ) + clickY * scale;
}

$('img').attr('zoom', 0);
$('.image').on('click', function () {
    resizeImg(this);
});

function resizeImg(img) {
    var zoom = $(img).attr('zoom');
    if (zoom == 0) {
        var scale = 150 / 100;
        var pos = $(img).offset();
        var clickX = event.pageX - pos.left;
        var clickY = event.pageY - pos.top;
        var container = $(img).parent().get(0);
        $(img).css({
            width: img.width * scale,
            height: img.height * scale
        }).attr('zoom', 1);
        container.scrollLeft = ($(container).width() / -2) + clickX * scale;
        container.scrollTop = ($(container).height() / -2) + clickY * scale;
    }else{
        $(img).attr('zoom',0).attr('style','');
    }
}

$('.image').on('click', function () {
    if (typeof this.toggleZoom === "undefined") this.toggleZoom = false;
    this.toggleZoom = !this.toggleZoom;
    resizeImg(this);
});

function resizeImg(img) {
    var scale = (img.toggleZoom) ? 150 / 100 : 100 / 150;
    console.log(scale);
    var pos = $(img).offset();
    var clickX = event.pageX - pos.left;
    var clickY = event.pageY - pos.top;
    var container = $(img).parent().get(0);

    $(img).css({
        width: img.width * scale,
        height: img.height * scale
    });

    container.scrollLeft = ($(container).width() / -2) + clickX * scale;
    container.scrollTop = ($(container).height() / -2) + clickY * scale;
}

    if (typeof this.toggleZoom === "undefined") this.toggleZoom = false;
    this.toggleZoom = !this.toggleZoom;

    var scale = (img.toggleZoom) ? 150 / 100 : 100 / 150;