edit basic/history and types/string #233
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在我的理解中WebAssembly应该是像字节码一样的东西吧,应该是JavaScript和其它语言都编译成WebAssembly而不是其它语言编译成JavaScript。
对于
btoa()方法,应该只能接收字符串值,其它值类似null这种好像都会被先转成"null"这样的字符串再运算。还有两个我不知道怎么改的地方:

basic/introduction的2.4(1)中说“JavaScript 的所有值都是对象”,但其实还有原始值吧。types/string中的这里:能否采用其它说法?(虽然我也想不到更正确的说法)