tencent cloud

Base Library
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Last updated: 2024-11-21 18:34:18
Base Library
Last updated: 2024-11-21 18:34:18
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console

The console.log method is used to output messages in the console window. This method can accept multiple parameters and concatenate their results for output.

Math

Properties

E
LN10
LN2
LOG2E
LOG10E
PI
SQRT1_2
SQRT2
For information on using the above properties, refer to the ES5 standard.。

Methods

abs
acos
asin
atan
atan2
ceil
cos
exp
floor
log
max
min
pow
random
round
sin
sqrt
tan
For information on using the above properties, refer to the ES5 standard.

JSON

Methods

stringify(object): Converts the object object into a JSON string and returns the string.
parse(string): Converts the JSON string into an object and returns the object.
Sample code:
console.log(undefined === JSON.stringify());
console.log(undefined === JSON.stringify(undefined));
console.log("null"===JSON.stringify(null));

console.log("111"===JSON.stringify(111));
console.log('"111"'===JSON.stringify("111"));
console.log("true"===JSON.stringify(true));
console.log(undefined===JSON.stringify(function(){}));


console.log(undefined===JSON.parse(JSON.stringify()));
console.log(undefined===JSON.parse(JSON.stringify(undefined)));
console.log(null===JSON.parse(JSON.stringify(null)));

console.log(111===JSON.parse(JSON.stringify(111)));
console.log("111"===JSON.parse(JSON.stringify("111")));
console.log(true===JSON.parse(JSON.stringify(true)));

console.log(undefined===JSON.parse(JSON.stringify(function(){})));


Number

Properties

MAX_VALUE
MIN_VALUE
NEGATIVE_INFINITY
POSITIVE_INFINITY
For information on using the above properties, refer to the ES5 standard.

Date

Properties

parse
UTC
now
For information on using the above properties, refer to the ES5 standard.

Global

Properties

NaN
Infinity
undefined
For information on using the above properties, refer to the ES5 standard.

Methods

parseInt
parseFloat
isNaN
isFinite
decodeURI
decodeURIComponent
encodeURI
encodeURIComponent
For information on using the above properties, refer to the ES5 standard.




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