代做Javascript | Html5代写 – 这是一个js代写练习题目
JS practice
Objective
Create a html5 page using a JS framework or other tools of your choosing (for example AngularJS, Angular2, React, etc.) to serve as a visual tool for creating an expression. Note that youre not required to use any particular framework.
Inputs: A list of javascript functions (for the purposes of this exercise you can assume that the list will be complete and available when the page loads and will not change).
Initial Display: For every function in the list, a unique icon will be displayed on screen, captioned with the function name. Additionally, a blank expression area will be present on the screen into which the user can drag and drop the name icons
Initial user interaction: The user can drag and drop one of the icons into the blank expression area. This will trigger additional placeholder areas (a simple
Advanced Extension (Extra Credit): The user can drag more function icons into the new placeholder areas created by dropping of the previous icon. This process can continue recursively indefinitely to create complex chained expressions
EXAMPLE
Sample function list provided: [ add, subtract, foo, doSomethingComplicated ]
Signatures of the functions function add(x,y) { … } function subtract(x,y) { … } function foo(x,y,z) { … } function doSomethingComplicated(x) { …}
Screen begins blank
User can drag and drop the add function (which receives 2 arguments)
Alternatively, user can drag and drop the doSomethingComplicated function (which receives 1 argument)
In the more advanced case, the process can be done recursively dragging and dropping a function into one of the newly created boxes.