鉴于代码行是同步的，节点 js 中的行的执行顺序是什么

Question

For example,

var doSomething = function() {`
    var a = 1, b = 2, c = 3;
    var d = a;
    b = b - 3;
    d = b;
    console.log(a,b,c,d);
}

doSomething();

Is there any possible situation beginning from the dawn of the universe until the end, that the output of the code when executed in node js - built on JavaScript's V8 engine would be anything other than 1 -1 3 -1.

Is there any combination of synchronous lines of code that do no execute in the order they are written.?

Any puns are not welcome and any help is appreciated.

Additional question:

var index = commonFunc.getObjectIndexFromArray(option[0].fields.custom_field, tableAccess.checkDomainInTable.selected_template); 
if (option[0].fields.custom_field && option[0].fields.custom_field.length > 0 && index >= 0) {
    userOptions = option[0]['fields']['custom_field'][index][tableAccess.checkDomainInTable.selected_template]; 
} 
if(tableAccess.checkDomainInTable.delivery_template) { 
    index = commonFunc.getObjectIndexFromArray(option[0].fields.custom_field, tableAccess.checkDomainInTable.delivery_template); 
    if (option[0].fields.custom_field && option[0].fields.custom_field.length > 0 && index >= 0) {
        deliveryOptions = option[0]['fields']['custom_field'][index][tableAccess.checkDomainInTable.delivery_template]; 
    } 
} 

In the above code, after assuming that the common function gets the index of a json object from an array of json object using simple for loop, can there be any situation in which the second occurence of the assignment of the variable index be executed first and the first occurence after that & causes an ambiguity in the values of userOptions and deliveryOptions ?

Answer 1

如果这是整个代码，并假设 V8 实现或底层硬件中没有错误 - 不，此代码将始终以相同的顺序执行并具有相同的结果（即您提供的结果）。