HTML Entity Code:

For HTML, you can use character references in the form of &#xXXXX;, where XXXX is the Unicode code point in hexadecimal. For example, if you wanted to use the symbol for the snowman (☃), which has a Unicode point U+2603, you would write ☃ in your HTML code.

CSS Escape Sequence:

In CSS, you can use escape sequences with a backslash followed by the Unicode hexadecimal value. For the same snowman symbol, in CSS, you would write \2603 before your selector content. For example:

.element::before {
content: “\2603”; /* Displays a snowman before the element’s content */
}

JavaScript Escape Sequence:

In JavaScript, you can represent Unicode characters with escape sequences using \uXXXX, where XXXX is the Unicode code point. For the snowman example, it would be “\u2603” in a string.

Since your image includes a wide range of symbols, you would need to look up or know the specific Unicode code point for each symbol you wish to use. For example:

• If you want to use the heart symbol (♥), which is U+2665, the HTML entity would be ♥, the CSS escape sequence would be \2665, and the JavaScript escape would be “\u2665”.
• For a chess piece like the black king (♔), which is U+2654, the HTML entity would be ♔, the CSS escape would be \2654, and the JavaScript escape would be “\u2654”.

If there’s a specific symbol from the chart you need the code for, let me know, and I can provide the exact sequence for that character.