The document contains 4 examples of JavaScript loop control structures: 1) A while loop that breaks out of the loop when the variable x equals 5, otherwise incrementing x. 2) A while loop using continue to skip printing when x equals 5, otherwise incrementing x. 3) Nested for loops using break to exit inner and outer loops at different conditions, and continue to skip to next inner iteration. 4) Nested for loops using continue to skip to next outer iteration when the inner loop variable j equals 3.