The first one looks like it can be implemented using jquery-ui, which is a slider component
The second one probably needs to be studied. When dragging, calculate the movement of x and y, and then bring it into the formula to find the next coordinate point in the direction of movement
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The first one looks like it can be implemented using jquery-ui, which is a slider component
The second one probably needs to be studied. When dragging, calculate the movement of x and y, and then bring it into the formula to find the next coordinate point in the direction of movement