???console?????????????????????????
???????????? ???????[ 2015/5/5 10:44:43 ] ???????????????
?????????????????????????????о??????????Щ?????????????????????? debugger ????ù??????????????????????????????????????
??????????????console.log(expression)???
???????????????????????????????????
function f1() {
console.time('time span');
}
function f2() {
console.timeEnd('time span');
}
setTimeout(f1?? 100);
setTimeout(f2?? 200);
function waitForMs(n) {
var now = Date.now();
while (Date.now() - now < n) {
}
}
waitForMs(500);//time span: 0ms
????????????????console????????????????????????????
????trace
????console.trace()??????????????ù????
????????????????????????У?????????ù????????????console.trace()???????????????????ù?????????????????????
function tracer(a) {
console.trace();
return a;
}
function foo(a) {
return bar(a);
}
function bar(a) {
return tracer(a);
}
var a = foo("tracer");
table
???????console?????????????
?????????????????????????????????????????????????????????????????????????????????????飬?????????????? undefined??
var people = {
flora: {
name: 'floraLam'??
age: '12'
}??
john: {
name: 'johnMa'??
age: '45'
}??
ray:{
name:'rayGuo'??
age:'22'
}
};
console.table(people);
??????
???·???
??????????????????
2023/3/23 14:23:39???д?ò??????????
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