为什么我收到错误缺失； 声明之前

Question

I have some very simple code but I am getting the aforementioned error, any ideas why?

Here is the code:

function changeSlides(new_slide) {

    ${'#app_dev'}.toggle('blind', 500);

}

Answer 1

Change ${'#app_dev'} to $('#app_dev')

$ is a function and needs to be called like one.

Answer 2

Use parentheses instead of curly brackets for the $ method:

$("#app_dev").toggle("blind", 500);

Answer 3

You need to use paras

function changeSlides(new_slide) {

    $('#app_dev').toggle('blind', 500); //switch { to )

}

Answer 4

The jquery selector function uses parentheses () not curly brackets {}

function changeSlides(new_slide) {

    $('#app_dev').toggle('blind', 500);

}

Answer 5

Wrong brackets, it should be: $('#app_dev')