CodePrimer
Search a living directory of web syntax. Pick a problem, copy a working sample, then adapt it.
JavaScript
Beginner
JavaScript ternary operator
How do I write a one-line if/else?
PHP
Beginner
Ternary and ??
How do I assign with a short conditional?
HTML
Beginner
Audio and video embeds
How do I embed media without Flash?
JavaScript
Beginner
Classic for loop
How do I loop a fixed number of times?
PHP
Beginner
switch statement
How do I handle many discrete cases?
HTML
Intermediate
Embed with iframe
How do I embed another page or map?
JavaScript
Beginner
for...of over an array
How do I loop array values cleanly?
PHP
Beginner
while loop
How do I loop while a condition is true?
PHP
Beginner
do...while loop
How do I run a loop at least once?
HTML
Beginner
Internal CSS with style tag
How do I put CSS inside the HTML file?
JavaScript
Beginner
JavaScript object basics
How do I store keyed data in JS?
PHP
Beginner
for loop
How do I loop with a counter?
HTML
Beginner
Semantic navigation bar
How do I mark up a site nav?
JavaScript
Beginner
Wait for DOMContentLoaded
Why is getElementById null?
JavaScript
Beginner
Block empty form fields in JS
How do I stop submit when a field is blank?
HTML
Beginner
Explicit label for= binding
How do I connect a label to an input?
PHP
Beginner
foreach over arrays
How do I loop an array in PHP?
PHP
Beginner
Declare a PHP function
How do I write a reusable function?