<!DOCTYPE html><html><head> <title>JavaScript en mode strict</title></head><body> <h1>JavaScript en mode strict</h1><script> console.log("Mode normal"); variableInconnueA=1;</script><script> "use strict"; console.log("Mode strict"); try { variableInconnueB=1; } catch (err) { console.log("erreur "+err); }</script></body></html>