There currently is not a version of Noodel that supports the syntax used in this answer. Here is a script that is supported:

23 bytes

Loading...¤”Ƈḟḋḣ⁺sḷạÇḍq

<div id="noodel" code="Loading...¤”Ƈḟḋḣ⁺sḷạÇḍq" input="" cols="12" rows="2"></div>

<script src="https://tkellehe.github.io/noodel/release/noodel-1.1.js"></script>
<script src="https://tkellehe.github.io/noodel/ppcg.min.js"></script>

Try it:)

Try it:)

Noodel, noncompeting 24 bytes

”|gAĖọẸ.?a5‘|/-\⁺ʂḷạÇḍ/4

Try it:)

”|gAĖọẸ.?a5              # Creates a compressed string that is "Loading...¤" that is decompressed and placed into the pipe.
           ‘|/-\         # Creates a character array ["|", "/", "-", "\"]
                ⁺ʂ       # Adds two items in the pipe which will add the string to each character in the array. The 'ʂ' forces it to prepend rather than append.
                  ḷ      # Unconditionally Loop everything up until a new line or end of program.
                   ạ     # Basic animation, iterates through an object moving to the next index every call on that object and returns what is at that index.
                    Ç    # Clears the screen then prints what is in the front of the pipe and dumps what was displayed.
                     ḍ/4 # Delays for the specified amount of time (/4 => 1/4 => 0.25s)

Noodel, noncompeting 24 25 bytes

Had to add a byte because messed up the compression algorithm:(

“Loading...¤‘|/-\⁺ʂḷạÇḍ/4

Try it:)

“Loading...¤              # Creates a string that is "Loading...¤" that is placed into the pipe.
            ‘|/-\         # Creates a character array ["|", "/", "-", "\"]
                 ⁺ʂ       # Adds two items in the pipe which will add the string to each character in the array. The 'ʂ' forces it to prepend rather than append.
                   ḷ      # Unconditionally Loop everything up until a new line or end of program.
                    ạ     # Basic animation, iterates through an object moving to the next index every call on that object and returns what is at that index.
                     Ç    # Clears the screen then prints what is in the front of the pipe and dumps what was displayed.
                      ḍ/4 # Delays for the specified amount of time (/4 => 1/4 => 0.25s)